Asus TX97 User Manual - Page 18

III. INSTALLATION 5. 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). 6. 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 FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0 III. INSTALLATION (Jumpers) 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 50MHz 55MHz 60MHz 66MHz 75MHz CPU External Clock (BUS) Frequency Selection R BF0 BF1 BF0 BF1 BF0 BF1 BF0 BF1 Complete Names: P54C/K5 Intel Pentium P54C P55C/K6/MX Pentium P55C-MMX IBM/Cyrix 6x86 AMD K5, K6 IBM/Cyrix 6x86L IBM/Cyrix 6x86(L) (M1) IBM/Cyrix 6x86MX(M2) 1 1 1 2 2 2 3 3 3 1.5x(3/2) 3.5x(7/2) 3.0x(3/1) 3.0x(3/1) 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) CPU : BUS Frequency Ratio 1 2 3 3.0x(3/1) 3.0x(3/1) ------- Set the jumpers by the Internal speed of the Intel, AMD, IBM, or Cyrix CPU as follows: CPU Model Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Intel Pentium Freq. 233MHz 200MHz 166MHz 150MHz 133MHz 120MHz 100MHz 90MHz 75MHz Ratio 3.5x 3.0x 2.5x 2.5x 2.0x 2.0x 1.5x 1.5x 1.5x BUS F. 66MHz 66MHz 66MHz 60MHz 66MHz 60MHz 66MHz 60MHz 50MHz (BUS Freq.) FS0 FS1 FS2 [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] (Freq. Ratio) BF1 BF0 [1-2] [1-2] [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] AMD-K6-PR233 AMD-K6-PR200 AMD-K6-PR166 233MHz 3.5x 200MHz 3.0x 166MHz 2.5x 66MHz 66MHz 66MHz [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] AMD-K5-PR133 AMD-K5-PR120 AMD-K5-PR100 AMD-K5-PR90 AMD-K5-PR75 100MHz 1.5x 90MHz 1.5x 100MHz 1.5x 90MHz 1.5x 75MHz 1.5x 66MHz 60MHz 66MHz 60MHz 50MHz [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] IBM/Cyrix6x86MX-PR233 200MHz 3.0x IBM/Cyrix6x86MX-PR200 166MHz 2.5x IBM/Cyrix6x86MX-PR166 150MHz 2.5x 66MHz 66MHz 60MHz [1-2] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] *IBM/Cyrix 6x86-PR166+ 133MHz 2.0x 66MHz [1-2] [2-3] [2-3] [1-2] [2-3] *NOTE: The only IBM or Cyrix 6x86 (M1) Rev 2.7 or later is supported on this motherboard (see previous page). Bootup screen will show 6x86-P166+ with the Cyrix PR166+ installed on this motherboard. 18 ASUS TX97 User's Manual