Asus KN97 User Manual - Page 18

ASUS KN97-X User's Manual, CPU External BUS Frequency Selection, FS0, FS1, CPU to BUS Frequency

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BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 R III. INSTALLATION (Jumpers) III. INSTALLATION 7. CPU External (BUS) Frequency Selection (FS0, FS1) These jumpers tell the clock generator what frequency to send to the CPU. These allow the selection of the CPUs External frequency (or BUS Clock). The BUS Clock times the BUS Ratio equals the CPUs Internal frequency (the advertised CPU speed). 8. CPU to BUS Frequency Ratio (BF0, BF1, BF2, BF3) 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. 123 66MHz 123 FS0 FS1 60MHz CPU External Clock (BUS) Frequency Selection 2.5X 3.0X 3.5X 4.0X 4.5X 5.0X CPU : BUS Frequency Ratio 5.5X Reserved Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows: CPU Model Intel Klamath Intel Klamath Freq. 266MHz 233MHz Ratio 4.0x 3.5x BUS Freq. 66MHz 66MHz (BUS Freq.) (Freq. Ratio) FS0 FS1 BF3 BF2 BF1 BF0 [2-3] [1-2] [short] [open] [short] [short] [2-3] [1-2] [short] [short] [open] [open] Intel Pentium II CPU Cartridge (233-266MHz 256/512KB L2 Cache) NOTE: Voltage Regulator Output Selection (VID) is not needed for the Pentium II CPU Cartridge because this CPU sends a VID signal directly to the onboard power controller. 18 ASUS KN97-X User's Manual

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18
ASUS KN97-X User’s Manual
III. INSTALLATION
(Jumpers)
III.
INSTALLATION
7.
CPU External (BUS) Frequency Selection
(FS0, FS1)
These jumpers tell the clock generator what frequency to send to the CPU.
These
allow the selection of the CPUs
External
frequency (or
BUS Clock
).
The BUS Clock
times the BUS Ratio equals the CPUs
Internal
frequency (the advertised CPU speed).
8.
CPU to BUS Frequency Ratio
(BF0, BF1, BF2, BF3)
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.
CPU : BUS Frequency Ratio
CPU External Clock (BUS)
Frequency Selection
BF1
BF0
BF3
BF2
2.5X
4.5X
BF1
BF0
BF3
BF2
3.0X
5.0X
60MHz
1
2
3
FS0
FS1
66MHz
1
2
3
BF1
BF0
BF3
BF2
4.0X
Reserved
BF1
BF0
BF3
BF2
3.5X
5.5X
Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:
(BUS Freq.)
(Freq. Ratio)
CPU Model
Fr
eq.
Ratio
BUS Fr
eq.
FS0
FS1
BF3
BF2
BF1
BF0
Intel Klamath
266MHz
4.0x
66MHz
[2-3]
[1-2]
[short] [open] [short] [short]
Intel Klamath
233MHz
3.5x
66MHz
[2-3]
[1-2]
[short] [short] [open] [open]
Intel Pentium II CPU Cartridge
(233-266MHz 256/512KB L2 Cache)
NOTE:
Voltage Regulator Output Selection (VID) is not needed for the Pentium II
CPU Cartridge because this CPU sends a VID signal directly to the onboard power
controller.