Asus P I-XP6NP5 User Manual - Page 16

III. INSTALLATION (Jumpers) III. INSTALLATION 5. CPU External Clock (BUS) Frequency Selection (JP8, JP9) 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 (JP10, JP11, JP12, JP13) 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 Clock (BUS) Frequency Selection. JP8 JP9 JP8 JP9 60MHz 66MHz CPU External Clock (BUS) Frequency Selection JP10 JP11 JP12 JP13 JP10 JP11 JP12 JP13 JP10 JP11 JP12 JP13 2.0x 3.0x 4.0x JP10 JP11 JP12 JP13 JP10 JP11 JP12 JP13 2.5x 3.5x CPU : BUS Frequency Ratio (2.0x, 2.5x, 3.0x, 3.5x, 4.0x) Set the jumpers by the Internal speed of the Intel CPU as follows: Internal 200MHz 180MHz Ratio External 3.0x 66MHz 3.0x 60MHz BUS Freq. JP9 JP8 [2-3] [1-2] [1-2] [2-3] CPU to BUS Freq. Ratio JP13 JP12 JP11 JP10 [short] [open] [short] [short] [short] [open] [short] [short] 166MHz 2.5x 66MHz [2-3] [1-2] [open] [short] [short] [short] 150MHz 2.5x 60MHz [1-2] [2-3] [open] [short] [short] [short] 10 ASUS P/I-XP6NP5 User's Manual