3. HARDWARE SETUP 6) CPU External Frequency Setting (DSW1 Switches 1–4) This option tells the clock generator what frequency to send to the CPU, SDRAM, PCI, and the chipset. This allows the selection of the CPU’s External frequency. The CPU External Frequency multiplied by the Frequency Multiple equals the CPU’s Internal frequency (the advertised CPU speed). IMPORTANT: 1. In JumperFree mode, all dip switches must be set to OFF. 2. When JumperFree mode is enabled, use BIOS setup in place of these switches (set CPU Speed in Advanced Menu in BIOS Setup). Motherboard Settings 3.
H/W SETUP 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 CPU 66MHz 33MHz 75MHz ON 68MHz ON 37.5MHz 80MHz ON ON PCI 34MHz 40MHz 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 CPU 83MHz ON 100MHz 33MHz 103MHz ON 34.3MHz 105MHz ON ON PCI 41.6MHz 35MHz 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 CPU ON ON ON ON ® CUA PCI 36.6MHz 110MHz 37.3MHz 115MHz 112MHz 38.3MHz 120MHz 40MHz 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 CUA CPU External Clock (BUS) Frequency Selection ON ON ON ON CPU 124MHz (JumperFree Mode) 133MHz 140MHz 150MHz PCI 31MHz 33MHz 35MHz 37.5MHz NOTE:
If your processor does not have a locked Frequency Multiple, you must use CPU Core:Bus Freq. Multiple in 4.4 Advanced Menu (BIOS) to set the Frequency Multiple. If the Frequency Multiple is locked, setting the Frequency Multiple in BIOS setup will have no effect. WARNING! Premature wearing of the processor may result when overclocking. Be sure that the DIMM you use can handle the specified SDRAM MHz or else bootup will not be possible. 22 ASUS CUA User’s Manual