ASUS p2em User Manual
16
ASUS P2E-M User’s Manual
III. INSTALLATION
Jumpers
III. INST
ALLA
TION
WARNING!
Do not overclock your processor. Frequencies above 66MHz ex-
ceed the specifications for the onboard Intel Chipset and are not guaranteed to be
stable. Overclocking can cause undue stress on the CPU and motherboard. It
may result in a slower speed or other unpredictable outcomes. The table on the
following page shows the approved CPUs and their settings.
stable. Overclocking can cause undue stress on the CPU and motherboard. It
may result in a slower speed or other unpredictable outcomes. The table on the
following page shows the approved CPUs and their settings.
Intel Pentium II Processor in a SEC Cartridge
(233-333MHz 512KB/128KB/0KB L2 Cache)
(233-333MHz 512KB/128KB/0KB L2 Cache)
Set the jumpers by the Internal speed of your processor as follows:
(BUS Freq.)
(Freq. Ratio)
CPU Model
Speed
F. Ratio
BUS F.
FS0 FS1 FS2
BF0 BF1 BF2 BF3
Intel Pentium II 333MHz
5.0x
66MHz
[1-2] [1-2] [1-2]
[2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz
4.5x
66MHz
[1-2] [1-2] [1-2]
[1-2] [2-3] [1-2] [2-3]
Intel Pentium II 266MHz
4.0x
66MHz
[1-2] [1-2] [1-2]
[2-3] [2-3] [1-2] [2-3]
Intel Pentium II 233MHz
3.5x
66MHz
[1-2] [1-2] [1-2]
[1-2] [1-2] [2-3] [2-3]
NOTE:
Voltage Regulator Output Selection (VID) is not needed for the Pentium II
processor because it sends a VID signal directly to the onboard power controller.
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).
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, 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.
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
CPU Core:Bus Frequency Multiple
P2E-M CPU Settings
83MHz
66MHz
75MHz
50MHz
3.5x(7/2)
4.0x(4/1)
4.5x(9/2)
5.0x(5/1)
3.0x(3/1)
BF1
BF2
BF0
BF3
1
2
3
2
3
R
BF1
BF2
BF0
BF3
1
2
3
2
3
BF1
BF2
BF0
BF3
1
2
3
2
3
BF1
BF2
BF0
BF3
1
2
3
2
3
BF1
BF2
BF0
BF3
1
2
3
2
3
FS2
FS1
FS0
1
2
3
2
3
FS2
FS1
FS0
1
2
3
2
3
FS2
FS1
FS0
1
2
3
2
3
FS2
FS1
FS0
1
2
3
2
3