User manual ASUS M2N68-AM

M2N68-AM PLUS Motherboard E4428 First Edition V1 January 2009 Copyright © 2009 ASUSTeK Computer Inc. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK Computer Inc. ("ASUS"). Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing. ASUS PROVIDES THIS MANUAL "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT. Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners' benefit, without intent to infringe. ii Contents Notices .......................................................................................................... v Safety information ...................................................................................... vi About this guide ......................................................................................... vi M2N68-AM PLUS specifications summary ............................................. viii Chapter 1: Product introduction 1.1 1.2 1.2.1 1.2.2 Before you proceed ..................................................................... 1-1 Motherboard overview ................................................................. 1-2 Motherboard layout ......................................................... 1-2 Layout contents............................................................... 1-2 1.3 1.4 Central Processing Unit (CPU) ................................................... 1-3 System memory ........................................................................... 1-3 1.4.1 1.4.2 1.5.1 1.5.2 1.5.3 1.5.4 1.5.5 Overview ......................................................................... 1-3 Memory configurations.................................................... 1-3 Installing an expansion card ........................................... 1-6 Configuring an expansion card ....................................... 1-6 PCI slot ........................................................................... 1-6 PCI Express x1 slot......................................................... 1-6 PCI Express x16 slot....................................................... 1-6 1.5 Expansion slots............................................................................ 1-6 1.6 1.7 Jumpers ........................................................................................ 1-7 Connectors ................................................................................... 1-8 1.7.1 1.7.2 1.8.1 1.8.2 Rear panel ports ............................................................. 1-8 Internal connectors ......................................................... 1-9 Installing an operating system ...................................... 1-15 Support DVD information .............................................. 1-15 1.8 Software support........................................................................ 1-15 Chapter 2: BIOS information 2.1 2.1.1 2.1.2 2.2 2.1.3 Managing and updating your BIOS ............................................ 2-1 ASUS Update utility ........................................................ 2-1 ASUS EZ Flash 2 utility................................................... 2-2 ASUS CrashFree BIOS 3 utility ...................................... 2-3 BIOS setup program .................................................................... 2-4 iii Contents 2.3 Main menu .................................................................................... 2-4 2.3.1 2.3.2 2.3.3 2.3.4 2.4 2.3.6 2.4.1 2.4.2 2.4.3 2.4.4 2.4.5 2.5 2.4.6 2.5.1 2.5.2 2.5.3 2.5.4 2.6 2.5.5 2.6.1 2.6.2 2.7 2.6.3 2.7.1 2.7.2 System Time ................................................................... 2-4 System Date ................................................................... 2-4 IDE Configuration............................................................ 2-5 Primary IDE Master/Slave and SATA 1~4 ....................... 2-5 System Information ......................................................... 2-6 JumperFree Configuration .............................................. 2-6 CPU Configuration .......................................................... 2-8 Chipset ............................................................................ 2-9 Onboard Devices Configuration .................................... 2-10 PCI PnP ........................................................................ 2-10 USB Configuration ........................................................ 2-10 Suspend Mode ...............................................................2-11 ACPI 2.0 Support ...........................................................2-11 ACPI APIC Support ........................................................2-11 APM Configuration ........................................................ 2-12 HW Monitor Configuration............................................. 2-12 Boot Device Priority ...................................................... 2-13 Boot Settings Configuration .......................................... 2-13 Security ......................................................................... 2-14 ASUS EZ Flash 2 .......................................................... 2-15 AI NET 2........................................................................ 2-15 Advanced menu ........................................................................... 2-6 Power menu ................................................................................ 2-11 Boot menu .................................................................................. 2-13 Tools menu ................................................................................. 2-15 2.8 Exit menu .................................................................................... 2-15 iv Notices Federal Communications Commission Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: · This device may not cause harmful interference, and · This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with manufacturer's instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Reorient or relocate the receiving antenna. · · · Increase the separation between the equipment and receiver. This device must accept any interference received including interference that may cause undesired operation. Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. Canadian Department of Communications Statement This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. This class B digital apparatus complies with Canadian ICES-003. DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin indicates that the product (electrical and electronic equipment) should not be placed in municipal waste. Check local regulations for disposal of electronic products. DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol of the crossed out wheeled bin indicates that the battery should not be placed in municipal waste. v Safety information Electrical safety · · · · · · To prevent electric shock hazard, disconnect the power cable from the electric outlet before relocating the system. When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device. Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged. Seek professional assistance before using an adapter or extension cord. These devices could interrupt the grounding circuit. Ensure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your local power company. If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer. Operation safety · · · · · · Before installing the motherboard and adding devices on it, carefully read all the manuals that came with the package. Before using the product, ensure that all cables are correctly connected and the power cables are not damaged. If you detect any damage, contact your dealer immediately. To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets, and circuitry. Avoid dust, humidity, and temperature extremes. Do not place the product in any area where it may become wet. Place the product on a flat and stable surface. If you encounter technical problems with the product, contact a qualified service technician or your retailer. About this guide This user guide contains the information you need when installing and configuring the motherboard. How this guide is organized This guide contains the following parts: · Chapter 1: Product introduction · This chapter describes the features of the motherboard and the new technology it supports. Chapter 2: BIOS information This chapter tells how to change system settings through the BIOS setup menus. Detailed descriptions of the BIOS parameters are also provided. vi Conventions used in this guide To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task. Where to find more information 1. ASUS websites Refer to the following sources for additional information and for product and software updates. The ASUS website provides updated information on ASUS hardware and software products. 2. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer. These documents are not part of the standard package. Typography Bold text Italics ++ Command Indicates a menu or an item to select. Used to emphasize a word or a phrase. Keys enclosed in the less-than and greater-than sign means that you must press the enclosed key. Example: means that you must press the Enter or Return key. If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example: ++ Means that you must type the command exactly as shown, then supply the required item or value enclosed in brackets. Example: At the DOS prompt, type the command line: afudos /i[filename] afudos/iM2N68AMP.ROM vii M2N68-AM PLUS specifications summary CPU AMD® Socket AM2+ / AM2 for AMD PhenomTM II / PhenomTM / AthlonTM FX / AthlonTM 64 / SempronTM processor AMD64 architecture enables simultaneous 32-bit and 64-bit computing AMD Cool `n' QuietTM Technology * Refer to www.asus.com for AMD CPU support list GeForce 7025 / NVIDIA nForce 630a 2000 / 1600 MT/s Dual-channel memory architecture 2 x 240-pin DIMM slots support unbuffered ECC and non-ECC DDR2 1066/800/667MHz Supports up to 4GB system memory * Due to AM2+ CPU limitation, only one DDR2 1066 DIMM is supported per channel. When two DDR2 1066 DIMMs are installed, all DIMMs run at 800MHz frequency by default for system stability. ** Refer to www.asus.com or user manual for Memory QVL (Qualified Vendors List) *** Due to the memory address limitation on 32-bit Windows OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you install a 64-bit Windows OS when having 4GB or more memory installed on the motherboard. 1 x PCI ExpressTM x16 slot 1 x PCI ExpressTM x1 slot 2 x PCI slots 1 x UltraDMA 133/100 4 x Serial ATA 3Gb/s connectors Supports RAID 0, RAID 1, RAID 10, RAID 5 (only for Vista OS) ALC662 High Definition Audio 6-channel CODEC Supports Vista Premium, Multistreaming Technologies. Supports up to 10 USB 2.0 ports (6 ports at mid-board, 4 ports at the back panel) Gigabit LAN 1 x PS/2 Keyboard port 1 x Mouse port 1 x VGA port 1 x RJ45 port 1 x COM port 1 x LPT port 4 x USB 2.0/1.1 ports 6-channel Audio I/O ports (continued on the next page) Chipset System bus Memory Expansion slots Storage / RAID Audio USB LAN Back panel I/O ports viii M2N68-AM PLUS specifications summary Internal I/O connectors 3 x USB 2.0 connectors support additional 6 USB 2.0/1.1 ports 1 x IDE connector 4 x SATA connectors 1 x front panel audio connector 1 x system panel connector 1 x CD audio-in connector 1 x S/PDIF out connector 1 x Internal speaker connector 1 x CPU fan connector 24-pin ATX power connector 4-pin ATX 12V power connector Integrated Programmable Shader model3.0 DirectX 9 graphics processor Supports maximum shared memory up to 256MB Supports RGB with max. resolution up to 1920 x 1440 @75Hz * We recommend system configuration when playing HD-DVD and Blu-ray Disc: DDR 800 1GB x 2 / Althlon 64 x 2 4400+ / Graphich shared memory 256MB / Purevideo HD support ASUS Q-Fan ASUS CrashFree BIOS3 ASUS EZ Flash2 ASUS MyLogo2 ASUS AI NET2 SFS (Stepless Frequency Selection): - HT turning from 200MHz to 300MHz at 1MHz increment - Memory turning from 533 MHz to 1066 MHz - PCIe frequency turning from 100 MHz up to 150 MHz at 1 MHz increment Overclocking protection - ASUS C.P.R. (CPU Parameter Recall) 8Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, ACPI2.0, SMBIOS 2.5 User manual 1 x Serial ATA cable 1 x UltraDMA 133/100/66 cable 1 x I/O shield uATX Form factor: 9.6'' x 8.2'' (24.4cm x 20.8cm) Drivers ASUS PC Probe II ASUS LiveUpdate Utilitys Anti-Virus software (OEM version) Graphics ASUS special features ASUS Overclocking features BIOS Accessories Form Factor Support DVD *Specifications are subject to change without notice. ix Chapter 1 Product introduction Thank you for buying an ASUS® M2N68-AM PLUS motherboard! Before you start installing the motherboard, and hardware devices on it, check the items in your motherboard package. Refer to page ix for the list of accessories. If any of the items is damaged or missing, contact your retailer. 1.1 Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. · Unplug the power cord from the wall socket before touching any component. · Use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, before handling components to avoid damaging them due to static electricity · Hold components by the edges to avoid touching the ICs on them. · Whenever you uninstall any component, place it on a grounded antistatic pad or in the bag that came with the component. · Before you install or remove any component, ensure that the ATX power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components. Onboard LED This motherboard comes with a standby power LED that lights up to indicate that the system is ON, in sleep mode, or in soft-off mode. This is a reminder that you must shut down the system and unplug the power cable before removing or plugging in any motherboard component. The illustration below shows the location of the onboard LED. 1-1 Chapter 1: Product introduction 1.2 1.2.1 Motherboard overview Motherboard layout Ensure that you install the motherboard into the chassis in the correct orientation. The edge with external ports goes to the rear part of the chassis. Place this side towards the rear of the chassis. Place six screws into the holes indicated by circles to secure the motherboard to the chassis. DO NOT overtighten the screws! Doing so can damage the motherboard. 1.2.2 1. 2. 3. 4. 5. 6. 7. 8 Layout contents Page 1-8 1-7 1-12 1-11 1-3 1-3 1-9 1-10 9. 10. 11. 12. 13. 14. 15. 16. Connectors/Jumpers/Slots USB connectors (10-1 pin USB56 USB78, and USB 910) Clear RTC RAM (3-pin CLRTC) Speaker connector (4-pin SPEAKER) Onboard LED System panel connector (10-1 pin PANEL) Digital audio connector (4-1 pin SPDIF_OUT) Optical drive audio connector (4-pin CD) Front panel audio connector (10-1 pin AAFP) Page 1-11 1-7 1-12 1-1 1-13 1-14 1-10 1-13 Connectors/Jumpers/Slots Keyboard/mouse power (3-pin KBPWR) USB device wake-up (3-pin USBPW1-4 ,and5-8) ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) CPU fan connector (4-pin CPU_FAN) AM2/AM2+ CPU socket DDR2 DIMM slots Serial ATA connectors (7-pin SATA1-4) IDE connector (40-pin PRI-EIDE) ASUS M2N68-AM PLUS 1-2 1.3 Central Processing Unit (CPU) This motherboard comes with a 940-pin AMD® Socket AM2+ / AM2 for AMD PhenomTM II / PhenomTM / AthlonTM FX / AthlonTM 64 / SempronTM processor. The AM2/AM2+ socket has a different pinout from the 940-pin socket designed for the AMD OpteronTM processor. Ensure that you use a CPU that is designed for the AM2/AM2+ socket. The CPU fits in only one correct orientation. DO NOT force the CPU into the socket to prevent bending the pins and damaging the CPU! 1.4 1.4.1 System memory Overview This motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets. A DDR2 DIMM has the same physical dimensions as a DDR DIMM but has a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to prevent installation on a DDR DIMM socket. The figure illustrates the location of the DDR2 DIMM sockets: Channel Channel A Channel B Sockets DIMM_A1 DIMM_B1 1.4.2 You may install 512MB, 1GB, and 2GB unbuffered ECC/non-ECC DDR2 DIMMs into the DIMM sockets. Memory configurations 1-3 Chapter 1: Product introduction · You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for the single-channel operation. · Always install DIMMs with the same CAS latency. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. · Due to the memory address limitation on the 32-bit Windows® OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you install a 64-bit Windows® OS when 4GB or more memory is installed on the motherboard. · This motherboard does not support DIMMs made up of 256 megabits (Mb) or less. · The default memory operation frequency depends on its SPD. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. · For system stability, use a more efficient cooling system to support a full memory load (2 DIMMs) or overclocking conditions. M2N68-AM PLUS Motherboard Qualified Vendors Lists (QVL) DDR2-667MHz capability Vendor Kingston Qimonda Micron HY Apacer Transcend ADATA ADATA ADATA PSC PSC GEIL G.SKILL Twinmos ELIXIR Leadmax Part No. KVR667D2N5/512 HYS64T64000EU-3S-B2 MT8HTF12864AY-667E1 HYMP512U64CP8-Y5 AB AU512E667C5KBGC 506010-4894 M2OAD5G3H3160Q1C52 M2OAD5G314170Q1C58 M2OAD5H3J4170I1C53 AL6E8E63J-6E1 AL7E8E63J-6E1 GX21GB5300SX F2-5400PHU2-2GBNT 8D-A3JK5MPETP M2Y1G64TU8HA2B-3C LRMP512U64A8-Y5 Size 512MB 512MB 1G 1G 512MB 1G 512MB 1G 2G 512MB 1G 1G 2G(kit of 2) 512MB 1G 1G SS/ DS SS SS SS DS SS DS SS DS DS SS DS DS DS SS DS DS CL N/A 5 5 5 5 5 N/A N/A N/A 5 5 3 5-5-5-15 5 5 N/A Chip No. SO1237650821 SBP D6408TR4CGL25 USL074905PECNB HYB18T512B00B2F3SFSS28171 D9HNL 7ZE17 HY5PS12521CFP-Y5 AM4B5708GQJS7E06332F E5108AJBG-6E-E AD29608A8A-3EG20813 AD29608A8A-3EG80814 AD20908A8A-3EG 30724 A3R12E3JFF717B9A00 A3R12E3JFF717B9A01 Heat-Sink Package D2 64M8CCF 0815 C7173S A3R12E3GEF633ACAOY M2TU51280AE-3C717095R28F HY5PS12821CFP-Y5 C 702AA Chip Brand Kingston Qimonda Micron Hynix Apacer Elpida ADATA ADATA ADATA PSC PSC GEIL G.SKILL PSC ELIXIR Hynix DIMM support A* · · · · · · · · · · · · · · · · B* · · · · · · · · · · · · · · · · ASUS M2N68-AM PLUS 1-4 DDR2-800MHz capability Vendor Kingston Kingston Samsung Samsung Samsung Qimonda Corsair Crucial HY Kingmax Apacer Apacer VDATA ADATA PSC GEIL G.SKILL G.SKILL OCZ Century Part No. KHX6400D2LLK2/1GN KVR800D2N5/1G M378T2863QZS-CF7 M391T2863QZ3-CF7 M378T5263AZ3-CF7 HYS64T64000EU-2.5-B2 CM2X2048-6400C5DHX BL12864AA804.8FE5 HYMP564U64CP8-S5 AB KLDC28F-A8KI5 78.91G91.9K5 78.A1GA0.9K4 M2GVD6G3H3160Q1E52 M2OAD6G314170Q1E58 AL7E8E63H-10E1K GX22GB6400LX F2-6400CL4D-2GBHK F2-6400CL4D-4GBPK OCZ2VU8004GK 28V0H8 Size 512MB 1G 1G 1G 4G 512MB 2G(Kit of 2) 2G(Kit of 2)(EPP) 512MB 512MB 512MB 2G 512MB 1G 2G 2G 1G 2G 1G 1G SS/ DS SS DS SS SS DS SS DS SS SS SS SS DS SS DS DS DS DS DS DS DS CL N/A N/A 6 6 N/A 6 5 N/A 5 N/A 5 5 N/A N/A 5 5 4 4 6 5 Chip No. Heat-Sink Package E5108AJBG-8E-E K4T1G084QQ-HCF7 K4T1G084QQ-HCF7(ECC) K4T2G084QA-HCF7 HYB18T512800B2F25FSS28380 Heat-Sink Package Heat-Sink Package HY5PS12821CFP-S5 KKA8FF1XF-JFS-25A AM4B5708JQJS8E0751C AM4B5808CQJS8E0747D VD29608A8A-25EG20813 AD29608A8A-25EG80810 A3R1GE3CFF750RABBP(ECC) Heat-Sink Package Heat-Sink Package Heat-Sink Package Heat-Sink Package HY5PS12821CFP-S5 Chip Brand Kingston Elpida Samsung Samsung Samsung Qimonda Corsair N/A Hynix Kingmax Apacer Apacer VDATA ADATA PSC GEIL G.SKILL G.SKILL OCZ Hynix DIMM support A* · · · · · · · · · · · · · · · · · · · · B* · · · · · · · · · · · · · · · · · · · · DDR2-1066MHz capability Vendor Corsair OCZ GEIL Part No. CM2X1024-8500C5 OCZ2N1066SR2DK GB24GB8500C5QC Size 1G 2G(kit of 2) 1G SS/ DS DS DS SS CL N/A 5-5-5-15 5 Chip No. Heat-Sink Package Heat-Sink Package(EPP) SN:00482080600160-1 GL2L128M88BA25AB Chip Brand N/A OCZ GEIL DIMM support A* · · · B* · · · · Due to AM2+ CPU limitation, only one DDR2 1066 is supported per channel. · The default DIMM frequency depends on its Serial Presence Detect (SPD), which is the standard way of accessing information from a memory module. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. SS - Single-sided / DS - Double - sided DIMM support: · A*: Supports one module inserted into either slot as the single-channel memory configuration. · B*: Supports one pair of modules inserted into both the yellow slots as one pair of dual-channel memory configuration. Visit the ASUS website at www.asus.com for the latest DDR2 667/800/1066MHz QVL. (continued on the next page) 1-5 Chapter 1: Product introduction 1.5 Expansion slots In the future, you may need to install expansion cards. The following sub-sections describe the slots and the expansion cards that they support. Ensure to unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard components. 1.5.1 1. 2. 3. 4. 5. 6. To install an expansion card: Installing an expansion card Before installing the expansion card, read the documentation that comes with it and make the necessary hardware settings for the card. Remove the chassis cover (if your motherboard is already installed in a chassis). Remove the bracket opposite the slot that you intend to use. Align the card connector with the slot and press firmly until the card is completely seated on the slot. Secure the card to the chassis with the screw. Replace the chassis cover. 1.5.2 1. 2. 3. After installing the expansion card, configure it by adjusting the software settings. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for information on BIOS setup. Assign an IRQ to the card. Install the software drivers for the expansion card. When using PCI cards on shared slots, ensure that the drivers support "Share IRQ" or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable. Configuring an expansion card 1.5.3 The PCI slots support cards such as LAN cards, SCSI cards, USB cards, and other cards that comply with the PCI specifications. PCI slot 1.5.4 This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications. PCI Express x1 slot 1.5.5 This motherboard supports PCI Express x16 graphics cards that comply with the PCI Express specifications. ASUS M2N68-AM PLUS 1-6 PCI Express x16 slot 1.6 1. This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2. 3. Plug the power cord and turn ON the computer. 4. Hold down the key during the boot process and enter BIOS setup to re-enter data. Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure! · If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. · You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut down and reboot the system, then the BIOS automatically resets parameter settings to default values. Clear RTC RAM (3-pin CLRTC) Jumpers 2. Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode). The USBPW5-10 jumper is for the internal USB connectors that you can connect to additional USB ports. USB device wake-up (3-pin USBPW5-10) 1-7 Chapter 1: Product introduction 3. This jumper allows you to enable or disable the keyboard/mouse and USB port 1-4 wake-up feature. When you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a key on the keyboard (the default is the Space Bar), clicking the mouse, or using a USB device. This feature requires an ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding setting in the BIOS. The PS2_USBPW1-4 jumper is for the rear USB ports. Keyboard/mouse power (3-pin KBPW) 1.7 1.7.1 Connectors Rear panel ports 1. 2. 3. PS/2 Mouse port. This port is for a PS/2 mouse. Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices. LAN (RJ-45) port. This port allows 10/100 PHY connection to a Local Area Network (LAN) through a network hub. LAN port LED indications SPEED LED Description No link Linked Data activity Status OFF ORANGE GREEN Description 10 Mbps connection 100 Mbps connection 1 Gbps connection ACT/LINK LED Status OFF YELLOW BLINKING LED LED (Orange) (Green) LAN port ASUS M2N68-AM PLUS 1-8 4. 5. 6. Line In port (light blue). This port connects to the tape, CD, DVD player, or other audio sources. Line Out port (lime). This port connects to a headphone or a speaker. In 4-channel and 6-channel configuration, the function of this port becomes Front Speaker Out. Microphone port (pink). This port connects to a microphone. Refer to the audio configuration table below for the function of the audio ports in 2, 4, or 6-channel configuration. Audio 2, 4, 6-channel configuration Port Light Blue Lime Pink Headset 2-channel Line In Line Out Mic In 4-channel Rear Speaker Out Front Speaker Out Mic In 6-channel Rear Speaker Out Front Speaker Out Bass/Center 7. 8. 9. 10. 11. 1. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect to USB 2.0 devices. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports connect to USB 2.0 devices. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices. COM port. This 9-pin COM1 port is for pointing devices or other serial devices. PS/2 Keyboard port. This port is for a PS/2 keyboard. Serial ATA connectors (7-pin SATA1, SATA2, SATA3, and SATA4) 1.7.2 Internal connectors These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk and optical disk drives. The Serial ATA 3Gb/s is backward compatible with Serial ATA 1.5Gb/s specification. The data transfer rate of the Serial ATA 3Gb/s is faster than the standard parallel ATA with 133MB/s (Ultra DMA133). Install the Windows® XP Service Pack 1 before using Serial ATA. 1-9 Chapter 1: Product introduction 2. The onboard IDE connector is for an Ultra DMA 133/100/66 signal cable. There are three connectors on each Ultra DMA 133 / 100 / 66 signal cable: blue, black, and gray. Connect the blue connector to the motherboard's IDE connector, then select one of the following modes to configure your devices. Drive jumper setting Single device Cable-Select or Master Cable-Select Two devices Master Slave Mode of device(s) Master Slave Master Slave Cable connector Black Black Gray Black or gray IDE connector (40-1 pin PRI_IDE) Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA cable connector. This prevents incorrect insertion when you connect the IDE cable. · If any device jumper is set as "Cable-Select", ensure that all other device jumpers have the same setting. · Use the 80-conductor IDE cable for Ultra DMA 133/100/66 IDE devices. 3. This connector allows you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card. Optical drive audio in connector (4-pin CD) ASUS M2N68-AM PLUS 1-10 4. These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with the USB 2.0 specification that supports up to 480Mbps connection speed. USB connectors (10-1 pin USB56, USB78, USB910) Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard! The USB 2.0 module is purchased separately. 5. The CPU fan connector supports cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the CPU fan cable to the CPU fan connector on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector. DO NOT forget to connect the CPU fan cable to the CPU fan connector. Insufficient air flow inside the system may damage the motherboard components. It is not a jumper! DO NOT place a jumper cap on the CPU fan connector. Only the CPU fan supports the ASUS Q-Fan feature. CPU fan connector (4-pin CPU_FAN) 1-11 Chapter 1: Product introduction 6. These connectors are for an ATX power supply. The plugs from the power supply are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) · We recommend that you use an ATX 12V Specification 2.0-compliant power supply unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power plugs. · If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin power plug can provide at least 15 A on +12 V and that the PSU has a minimum power rating of 300 W. The system may become unstable or may not boot up if the power is inadequate. · DO NOT forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will not boot up. · We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices. The system may become unstable or may not boot up if the power is inadequate. · If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus. com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details. · You must install a PSU with a higher power rating if you intend to install additional devices. 7. This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings. Speaker connector (4- pin SPEAKER) ASUS M2N68-AM PLUS 1-12 8. This connector supports several chassis-mounted functions. System panel connector (10-1 pin F_PANEL) · System power LED (2-pin PWRLED) · This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode. Hard disk drive activity LED (2-pin HDLED) · This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable to this connector. The IDE LED lights up or flashes when data is read from or written to the HDD. Power/Soft-off button (2-pin PWRBTN) This 2-pin connector is for the system power button. Pressing the power button turns the system ON or puts the system in SLEEP or SOFT-OFF mode depending on the BIOS settings. Pressing the power switch for more than four seconds while the system is ON turns the system OFF. Reset button (2-pin RESET) This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power. This connector is for a chassis-mounted front panel audio I/O module that supports either High Definition Audio or AC`97 audio standard. Connect one end of the front panel audio I/O module cable to this connector. Front panel audio connector (10-1 pin AAFP) · 9. If you want to connect a high-definition front panel audio module to this connector, ensure that the Front Panel Select item in the BIOS is set to [HD Audio]. If you want to connect an AC97 front panel audio module to this connector, set the item to [AC97]. See page 2-9 for details. 1-13 Chapter 1: Product introduction 10. This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect the S/PDIF Out module cable to this connector, then install the module to a slot opening at the back of the system chassis. Digital audio connector (4-1 pin SPDIF_OUT) The S/PDIF module is purchased separately. ASUS M2N68-AM PLUS 1-14 1.8 1.8.1 Software support Installing an operating system This motherboard supports Windows® XP/Vista Operating Systems (OS). Always install the latest OS version and corresponding updates to maximize the features of your hardware. · Motherboard settings and hardware options vary. Refer to your OS documentation for detailed information. · Ensure that you install Windows® XP Service Pack 1 or later versions before installing the drivers for better compatibility and system stability. 1.8.2 The Support DVD that comes with the motherboard package contains drivers, software applications, and utilities that you can install to get all motherboard features. Support DVD information To run the Support DVD Place the Support DVD into the optical drive. The DVD automatically displays the Drivers menu if the Autorun function is enabled on your computer. The contents of the Support DVD are subject to change at any time without notice. Visit the ASUS website at www.asus.com for updates. Click an icon to display Support DVD/ motherboard information Click an item to install If the Autorun function is NOT enabled on your computer, browse the contents of the Support DVD to locate the file ASSETUP.EXE from the BIN folder. Double-click ASSETUP.EXE to run the DVD. 1-15 Chapter 1: Product introduction Chapter 2 BIOS information 2.1 Managing and updating your BIOS Save a copy of the original motherboard BIOS file to a bootable USB flash disk in case you need to restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update utility.. 2.1.1 The ASUS Update is a utility that allows you to manage, save, and update the motherboard BIOS in Windows® environment. · ASUS Update requires an Internet connection either through a network or an Internet Service Provider (ISP). · This utility is available in the Support DVD that comes with the motherboard package. ASUS Update utility Installing ASUS Update: 1. 2. 3. Place the Support DVD into the optical drive. The Drivers menu appears. Click the Utilities tab, then click Install ASUS Update. Follow the onscreen instructions to complete the installation. Quit all Windows® applications before you update the BIOS using this utility. Updating the BIOS: To update the BIOS: 1. 2. From the Windows® desktop, Click Start > Programs > ASUS > ASUS Update > ASUS Update to launch the ASUS Update utility. From the dropdown list, select either of the following methods: a. Select Update BIOS from the Internet, then click Next. b. Select the ASUS FTP site nearest you to avoid network traffic, or click Auto Select then click Next. c. From the FTP site, select the BIOS version you want to download then click Next. The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features. Updating from the Internet Chapter 2: BIOS information 2-1 a. Select Update BIOS from a file, then click Next. b. Locate the BIOS file from the Open window, then click Open. 3. Follow the onscreen instructions to complete the updating process. Updating from a BIOS file 2.1.2 The ASUS EZ Flash 2 feature allows you to update the BIOS without having to go through the long process of booting from a USB flash disk and using a DOS-based utility. Download the latest BIOS file from the ASUS website at www.asus.com. ASUS EZ Flash 2 utility To update the BIOS using EZ Flash 2: 1. Insert the USB flash disk that contains the latest BIOS file to a USB port, then launch EZ Flash 2. You can launch EZ Flash 2 in two ways. a. Press + during POST to display the following: ASUSTek EZ Flash 2 BIOS ROM Utility V3.06 FLASH TYPE: MXIC 25L8005 Current ROM BOARD: M2N68-AM PLUS VER: 0208 DATE: 01/16/2009 PATH: A:\ A: Update ROM BOARD: Unknown VER: Unknown DATE: Unknown Note [Enter] Select or Load [B] Backup [ESC] Exit [Tab] Switch [Up/Down/Home/End] Move b. Enter the BIOS setup program. Go to Tools > EZ Flash 2 then press . 2. Press to locate the correct file. Press . When the correct BIOS file is found, EZ Flash 2 performs the BIOS update process and automatically reboots the system when done. · This function supports USB flash disks with FAT 32/16 format and single partition only. · DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure! 2-2 ASUS M2N68-AM PLUS 2.1.3 The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can update a corrupted BIOS file using the motherboard Support DVD or a USB flash disk that contains the updated BIOS file. · Prepare the motherboard Support DVD or a USB flash disk containing the updated motherboard BIOS before using this utility. · Always connect the SATA cable to the SATA1/2 connector; otherwise, the utility will not function. ASUS CrashFree BIOS 3 utility Recovering the BIOS To recover the BIOS: 1. 2. Turn on the system. Insert the Support DVD or USB flash disk containing the BIOS file to the optical disk drive or a USB port. The utility displays the following message and automatically checks the Support DVD or the USB flash disk for the BIOS file. Bad BIOS checksum. Starting BIOS recovery... Checking for CD-ROM... When the BIOS file is found, the utility reads it and starts erasing the corrupted BIOS file. Bad BIOS checksum. Starting BIOS recovery... Checking for CD-ROM... CD-ROM found! Reading file "M2N68AMP.ROM". Completed. Start Erasing... Start Programming... 3. Restart the system after the utility completes the updating process. · Only the USB flash disk with FAT 32/16 format and single partition supports ASUS CrashFree BIOS 3. The device size should be smaller than 8GB. · DO NOT shut down or reset the system while updating the BIOS! Doing so can cause system boot failure! The recovered BIOS may not be the latest BIOS version for this motherboard. Download the latest BIOS file from the ASUS website at www.asus.com. Chapter 2: BIOS information 2-3 2.2 BIOS setup program Use the BIOS Setup program when you are installing a motherboard, reconfiguring your system, or prompted to "Run Setup." This section explains how to configure your system using this utility. If you want to enter Setup after POST, reboot the system by doing any of the following procedures: · Restart using the OS standard shut-down procedure. · · · Press ++ simultaneously. Press the reset button on the system chassis. Press the power button to turn the system off then back on. Using the power button, reset button, or the ++ keys to force reset from a running operating system can cause damage to your data or system. We recommend that you always shut down the system properly from the operating system. · The default BIOS settings for this motherboard apply to most conditions to ensure optimum performance. If the system becomes unstable after changing any BIOS settings, load the default settings to ensure system compatibility and stability. Select the Load Setup Defaults item under the Exit menu. See section 2.8 Exit menu. · The BIOS setup screens in this section are for reference only. They may not exactly match what you see on your screen. · Visit the ASUS website at www.asus.com to download the latest BIOS file for this motherboard. 2.3 When you enter the BIOS Setup program, the Main menu screen appears, giving you an overview of the basic system information. Main Advanced Power BIOS SETUP UTILITY Boot Tools Exit Use [ENTER], [TAB] or [SHIFT-TAB] to select a field. Use [+] or [-] to configure system Time. Select Screen Select Item +- Change Field Tab Select Field F1 General Help F10 Save and Exit ESC Exit Main menu System Time[19:34:30] System Date [Wed 08/27/2008] IDE Configuration Primary IDE Master Primary IDE Slave SATA1 SATA2 SATA3 SATA4 System Information :[Not :[Not :[Not :[Not :[Not :[Not Detected] Detected] Detected] Detected] Detected] Detected] 2.3.1 2.3.2 2-4 Allows you to set the system time. System Time [xx:xx:xx] System Date [Day xx/xx/xxxx] ASUS M2N68-AM PLUS Allows you to set the system date. 2.3.3 IDE Configuration Onboard IDE Controller [Enabled] Serial-ATA Devices [Device 0/1] Allows you to enable or disable the onboard IDE controller. Configuration options: [Enabled] [Disabled] Allows you to disable or enable the Serial-ATA devices. Configuration options: [Disabled] [Device 0] [Device 0/1] nVidia RAID Function [Disabled] Allows you to disable or enable the nVidia RAID function. Configuration options: [Disabled] [Enabled] 2.3.4 While entering Setup, the BIOS automatically detects the presence of IDE/SATA devices. There is a separate submenu for each IDE/SATA device. Select a device item then press to display the IDE/SATA device information. The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size, LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART monitoring). These values are not user-configurable. These items show Not Detected if no IDE/SATA device is installed in the system. Primary IDE Master/Slave and SATA 1~4 Type [Auto] Selects the type of IDE drive. Setting to [Auto] allows automatic selection of the appropriate IDE device type. Select [CDROM] if you are specifically configuring a CD-ROM drive. Select [ARMD] (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive. This item does not appear when you select the SATA 1/2/3/4 devices. LBA/Large Mode [Auto] Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device supports this mode, and if the device was not previously formatted with LBA mode disabled. Configuration options: [Disabled] [Auto] Block (Multi-Sector Transfer) M [Auto] Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from and to the device occurs multiple sectors at a time if the device supports multi-sector transfer feature. When set to [Disabled], the data transfer from and to the device occurs one sector at a time. Configuration options: [Disabled] [Auto] PIO Mode [Auto] Selects the PIO mode. Configuration options: [Auto] [0] [1] [2] [3] [4] DMA Mode [Auto] Selects the DMA mode. Configuration options: [Auto] SMART Monitoring [Auto] Sets the Smart Monitoring, Analysis, and Reporting Technology. Configuration options: [Auto] [Disabled] [Enabled] 32Bit Data Transfer [Enabled] Chapter 2: BIOS information Enables or disables 32-bit data transfer. Configuration options: [Disabled] [Enabled] 2-5 2.3.6 This menu gives you an overview of the general system specifications. The BIOS automatically detects the items in this menu. System Information AMI BIOS Displays the auto-detected BIOS information Processor Displays the auto-detected CPU specification System Memory Displays the auto-detected system memory 2.4 The Advanced menu items allow you to change the settings for the CPU and other system devices. Take caution when changing the settings of the Advanced menu items. Incorrect field values can cause the system to malfunction. BIOS SETUP UTILITY Boot Tools Exit Adjust System Frequency etc. Advanced menu MainAdvanced Power JumperFree Configuration CPU Configuration Chipset Onboard Devices Configuration PCIPnP USB Configuration 2.4.1 JumperFree Configuration CPU Overclocking [Auto] Selects the CPU overclocking options to achieve desired CPU internal frequency. [Manual] - Allows you to manually set overclocking parameters. [Auto] - Loads the optimal settings for the system. [Overclock Profile] - Loads overclocking profiles with optimal parameters for stability when overclocking. [Standard] - Load the standard settings for the system. The following item appears only when the CPU Overclocking item is set to [Manual]. CPU Frequency [200.0] Allows you to set the CPU frequency. The valid value is from 200 MHz to 300 MHz. The following item appears only when the CPU Overclocking item is set to [Overclock Profile]. Overcloking Options [Auto] Allows you to select the overclocking profile. Configuration options: [Auto] [Overclock 3%] [Overclock 5%] [Overclock 7%] PCIE Overclocking [Auto] 2-6 Configures the PCIE overclocking options. Configuration options: [Auto] [Manual] ASUS M2N68-AM PLUS The following item appears only when the PCIE Overclocking item is set to [Manual]. PCIE Clock [100] Allows you to manually adjust PCIE clock. Key in a number between 100 to 150. Processor Frequency Multiplier [Auto] Allows you to set the processor frequency multiplier. Configuration options: [Auto] [x4.0 800 MHz] [x5.0 1000 MHz] [x6.0 1200 MHz] [x7.0 1400 MHz] [x8.0 1600 MHz] [x9.0 1800 MHz] Processor Voltage [Auto] Allows you to set the processor voltage. Configuration options: [Power Saving Mode] [Standard] [+50mv] [+100mv] Memory Clock Mode [Auto] Allows you to set the memory clock mode. Configuration options: [Auto] [Manual] The following item appears only when you set the Memory Clock Mode item to [Manual]. Memclock Value [200 MHz] Allows you to select the memclock value. Configuration options: [200 MHz] [266 MHz] [333MHz] [400 MHz] DRAM Timing Mode [Auto] Allows you to set the DRAM timing mode. Configuration options: [Auto] [DCT 0] The following items appear only when the DRAM Timing Mode item is set to [DCT 0]. CAS# Latency [ Auto] TRCD [ Auto] TRP [ Auto] Allows you to set CAS# latency. Configuration options: [Auto] [3 CLK] [4 CLK] [5 CLK] [6 CLK] [7 CLK DH_Only] Allows you to set TRCD. Configuration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto] Allows you to set TRP. Configuration options: [3 CLK] [4 CLK] [5 CLK] [6 CLK] [Auto] tRTP [ Auto] Allows you to specify the read CAS# to percharge time. Configuration options: [Auto] [2-4 CLK] [3-5 CLK] TRAS [ Auto] Allows you to set TRAS. Configuration options: [5 CLK] [6 CLK] [7 CLK] [8 CLK] [9 CLK] [10 CLK] [11 CLK] [12 CLK] [13 CLK] [14 CLK] [15 CLK] [16 CLK] [17 CLK] [18 CLK] [Auto] TRC [ Auto] Allows you to set TRC. Configuration options: [11 CLK] [12 CLK] [13 CLK] [14 CLK] [15 CLK] [16 CLK] [17 CLK] [18 CLK] [19 CLK] [20 CLK] [21 CLK] [22CLK] [23 CLK] [24 CLK] [25 CLK] [26 CLK] [Auto] tWR [ Auto] Allows you to specify when the last write is registered by the DRAM. Configuration options: [Auto] [3 CLK] [4 CLK] [5 CLK] [6 CLK] TRRD [ Auto] Allows you to set TRRD. Configuration options: [2 CLK] [3 CLK] [4 CLK] [5 CLK] [Auto] Chapter 2: BIOS information 2-7 tRWTTO [ Auto] tWRRD [ Auto] tWTR [ Auto] Allows you to set tRWTTO. Configuration options: [Auto] [2 CLK] [3 CLK] [4 CLK] [5 CLK] [6 CLK] [7 CLK] [8 CLK] [9 CLK] Allows you to specify the write to read delay when accessing different DRAMs. Configuration options: [Auto] [0 CLK] [1 CLK] [2 CLK] [3 CLK] Allows you to specify the write to read delay when accessing the same DRAM. Configuration options: [1 CLK] [2 CLK] [3 CLK] [Auto] tWRWR [ Auto] tRDRD [ Auto] Allows you to specify the Twrwr time. Configuration options: [Auto] [0 CLK] [1 CLK] [2 CLK] [3 CLK] Allows you to specify the Trdrd time. Configuration options: [Auto] [2 CLK] [3 CLK] [4 CLK] [5 CLK] tRFC0/1/2/3[ Auto] Allows you to specify the Trfc0/1/2/3 time. Configuration options: [Auto] [75ns] [105ns] [127.5ns] [195ns] [327.5ns] Memory Over Voltage [Auto] Allows you to set the Memory Over Voltage. Use +/- to adjust the voltage. The increment is 0.00625V. The standard value is 1.85000V. Configuration options: [Auto] [Min = 1.850000V] [Max = 2.24375V] Chipset Voltage [Auto] Allows you to set the Chipset Voltage. Configuration options: [Auto][+ 50mv] [+ 100mv] [+ 150mv] 2.4.2 CPU Configuration GART Error Reporting [Disabled] This option should remain disabled for the normal operation. The driver developer may enable it for testing purpose. Configuration options: [Disabled] [Enabled] Microcode Updation [Enabled] Allows you to enable or disable the microcode updation. Configuration options: [Disabled] [Enabled] Secure Virtual Machine Mode [Enabled] Cool `n' Quiet [Enabled] Allows you to enable or disable the AMD Secure Virtual Machine mode. Configuration options: [Disabled] [Enabled] Allows you to enable or disable the generation of ACPI_PPC, _PSS, and _PCT objects. Configuration options: [Disabled] [Enabled] CPU Prefetching [Enabled] Allows you to enable or disable the CPU prefetching. Configuration options: [Enabled][Disabled] 2-8 ASUS M2N68-AM PLUS 2.4.3 The Chipset menu allows you to change the advanced chipset settings. Select an item then press to display the submenu. Chipset NorthBridge Configuration Memory Configuration Bank Interleaving [Auto] Allows you to enable the bank memory interleaving. Configuration options: [Disabled] [Auto] Channel Interleaving [Disabled] Allows you to enable the channel memory interleaving. Configuration options: [Disabled] [Address bits 6] [Address bits 12] [XOR of Address bits [20:16,6] ] [XOR of Address bits [20:16,9] ]