Installation; Jumper Settings - Asus C-P55T2D User Manual

III. INSTALLATION

Jumper Settings

CPU to BUS Frequency Ratio (JP15, 16)
These jumpers set the frequency ratio between the Internal frequency of the
CPU and the External frequency (called the BUS Clock) within the CPU.
2
Complete Names:
Intel Pentium P54C, P55C-MMX
AMD K5, K6
IBM/Cyrix 6X86, 6x86MX
Set the jumpers by the Internal speed of the
CPU BUS
Internal Ratio
233MHz 3.5x
200MHz 3.0x
166MHz 2.5x
150MHz 2.5x
133MHz 2.0x
120MHz 2.0x
100MHz 1.5x
90MHz 1.5x
75MHz 1.5x
WARNING: The CPU and/or motherboard will overheat if there is no
airflow across the CPU and onboard heatsinks.
ASUS C-P55T2D User's Manual
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JP15
JP16
1.5x(3/2)
P54C/K5
3.5X(7/2)
P55C/K6/MX
3.0x(3/1)
IBM/Cyrix 6X86
CPU : BUS Frequency Ratio
Intel Pentium
(CPU Card
BUS Ratio) Ext.
JP15 JP16 Freq.
[OFF] [OFF] 66MHz
[ON] [OFF] 66MHz
[ON] [ON] 66MHz
[ON] [ON] 60MHz
[OFF] [ON] 66MHz
[OFF] [ON] 60MHz
[OFF] [OFF] 66MHz
[OFF] [OFF] 60MHz
[OFF] [OFF] 50MHz
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1
2
2
3
3
66MHz 60MHz 50MHz
CPU External Clock (BUS) Frequency Selection
2 5/2 3
2.0x(2/1) 2.5x(5/2) 3.0x(3/1)
2.0x(2/1) 2.5x(5/2) 3.0x(3/1)
2.0x(2/1) 1.0x(1/1) 4.0x(4/1)
or compatible CPUs as follows:
(CPU Ext. Freq
on Baseboard)
JP3 JP2
[1-2] [2-3]
[1-2] [2-3]
[1-2] [2-3]
[2-3] [1-2]
[1-2] [2-3]
[2-3] [1-2]
[1-2] [2-3]
[2-3] [1-2]
[1-2] [1-2]
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2
3
3