Asus P I-P6NP5 User Manual - Page 16

III. INSTALLATION (Jumpers) III. INSTALLATION 5. CPU External (BUS) Frequency Selection (JP2, JP3) These jumpers tells the clock generator what frequency to send to the CPU. These allow the selection of the CPU's External frequency (or BUS Clock). The BUS Clock times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed). 6. CPU to BUS Frequency Ratio (JP4, 5, 6, 7) These jumpers set the frequency ratio between the Internal frequency of the CPU and the External frequency (called the BUS Clock) within the CPU. These must be set together with the above jumpers CPU External (BUS) Frequency Selection. 1 23 1 23 JP2 JP2 JP3 JP3 60MHz 66MHz CPU External Clock (BUS) Frequency Selection JP5 JP7 JP6 JP4 2.0 x 2.5 x 3.0 x 3.5 x 4.0 x 5.0 x CPU : BUS Frequency Ratio (2.0x, 2.5x, 3.0x, 3.5x, 4.0x, 5.0x) Set the jumpers by the Internal speed of the Intel CPU as follows: External Freq.: JP 200 JP2 [1-2] JP3 [2-3] 180 [2-3] [1-2] 166 [1-2] [2-3] 150 [2-3] [1-2] CPU:BUS Ratio: JP5 JP7 JP6 JP4 [On] [On] [Off] [On] [On] [On] [Off] [On] [On] [Off] [On] [On] [On] [Off] [On] [On] CPU:BUS Ratio: 3.0x 3.0x 2.5x 2.5x External Freq.: 66MHz 60MHz 66MHz 60MHz 10 P/I-P6NP5 User's Manual