Asus TXP4 TXP4 User Manual - Page 16

III. INSTALLATION 3. CPU External (BUS) Frequency Selection (FS0, FS1, FS2) These jumpers tell 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). 4. CPU to BUS Frequency Ratio (BF0, BF1, BF2) 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. WARNING! Frequencies above 66MHz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable. The following table is for general reference purposes only. Always refer to the instructions included with your CPU when possible. FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 R 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 50MHz 55MHz 60MHz 66MHz 75MHz 83MHz CPU External Clock (BUS) Frequency Selection BF2 BF1 BF0 BF2 BF1 BF0 BF2 BF1 BF0 BF2 BF1 BF0 BF2 BF1 BF0 BF2 BF1 BF0 TXP4 CPU Settings Match the table's Ratio column to these CPU types: 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 CPU A CPU B CPU C CPU D CPU E 1.5x(3/2) 3.5x(7/2) 3.0x(3/1) 3.0x(3/1) 3.5x(7/2) 2.0x(2/1) 2.0x(2/1) 2.0x(2/1) 2.0x(2/1) 2.0x(2/1) 2.5x(5/2) 2.5x(5/2) 1.0x(1/1) 2.0x(2/1) 2.5x(5/2) 3.0x(3/1) 3.0x(3/1) ------3.0x(3/1) ---- ---- ---- ---- ---- ---- ---- ---- 4.0X(4/1) (4.5X)(9/2) CPU : BUS Frequency Ratio III. INSTALLATION (Jumpers) 16 ASUS TXP4 User's Manual