Appendix C Jumper Table Summary Selecting the CPU Frequency With the help of Pentium II VID signal and SMbus, this motherboard is jumperless design. The CPU frequency selection is set by going into: BOIS Setup à Chipset Features Setup à CPU Clock Frequency (The possible setting is 66, 68.5, 75, 83.3, 100, 103, 112 and 133.3 MHz) BOIS Setup à Chipset Features Setup à CPU Clock Ratio (The possible setting is 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x) INTEL Pentium II Pentium II - 233 Pentium II - 266 Pentium II - 300 Pentium II - 333 Pentium II - 350 Pentium II - 400 Pentium II - 450 Celeron 266 Celeron 300 Celeron 300A Celeron 333 CPU Core Frequency 233MHz = 266MHz = 300MHz = 333MHz = 350MHz= 400MHz= 450MHz= 266MHz= 300MHz 300MHz 333MHz Ratio 3.5x 4x 4.5x 5x 3.5x 4x 4.5x 4x 4.5x 4.5x 5x External Bus Clock 66MHz 66MHz 66MHz 66MHz 100MHz 100MHz 100MHz 66MHz 66MHz 66MHz 66MHz Warning: INTEL 440BX chipset supports maximum 100MHz external CPU bus clock, the 103, 112 and 133.3MHz are for internal test only. These settings exceed the specification of BX chipset, which may cause serious system damage. C-1 Jumper Table Summary Selecting the CPU Voltage This motherboard supports Pentium II (Klamath) VID function, the CPU core voltage is automatically detected, the range is from 1.3V to 3.5V. Clear CMOS JP14 1-2 2-3 Clear CMOS Normal operation (default) Clear CMOS Tip: If your system hangs or fails to boot because of overclocking, please clear CMOS and the system will go back to default setting. Except using JP14, you can also press key to clear CMOS while system booting. AGP Ratio JP23 1-2 3-4 5-6 AGP Ratio Auto 2/3 1/1 C-2 ...