Asus HX97 User Manual - Page 16

III. INSTALLATION 4. 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). 5. CPU to BUS Frequency Ratio (BF0, BF1) 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. FS2 FS1 FS0 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 1 1 1 1 2 2 2 2 3 3 3 3 50MHz 55MHz 60MHz 66MHz CPU External Clock (BUS) Frequency Selection BF1 FS2 BF0 BF1 BF0 BF0 BF1 BF0 BF1 R III. INSTALLATION (Jumpers) Complete Names: Intel Pentium P54C, P55C AMD K5, K6 Cyrix M1, M2 P54C/K5 1.5x(3/2) 2.0x(2/1) P55C/K6/M2 3.5X(7/2) 2.0x(2/1) Cyrix M1 3.0x(3/1) 2.0x(2/1) CPU : BUS Frequency Ratio 2.5x(5/2) 2.5x(5/2) 1.0x(1/1) 3.0x(3/1) 3.0x(3/1) 4.0x(4/1) Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows: CPU Model Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium AMD-K6-PR233 AMD-K6-PR200 AMD-K6-PR166 AMD-K5-PR133 AMD-K5-PR120 AMD-K5-PR100 AMD-K5-PR90 AMD-K5-PR75 Freq. 200MHz 166MHz 150MHz 133MHz 120MHz 100MHz 90MHz 75MHz Ratio 3.0x 2.5x 2.5x 2.0x 2.0x 1.5x 1.5x 1.5x 233MHz 3.5x 200MHz 3.0x 166MHz 2.5x 100MHz 1.5x 90MHz 1.5x 100MHz 1.5x 90MHz 1.5x 75MHz 1.5x BUS Freq. 66MHz 66MHz 60MHz 66MHz 60MHz 66MHz 60MHz 50MHz 66MHz 66MHz 66MHz 66MHz 60MHz 66MHz 60MHz 50MHz (BUS Frequency) FS0 FS1 FS2 [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] (Freq. Ratio) BF1 BF0 [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] *Cyrix 166+ 133MHz 2.0x 66MHz [2-3] [1-2] [2-3] [1-2] [2-3] *NOTE: Only Cyrix Rev 2.7 or later is supported on this motherboard. See next page for revision identification. Bootup screen will show 6x86-P166+ with the Cyrix 166+ installed on this motherboard. 16 ASUS HX97 User's Manual