User Guide

ASUS A7V266-C User’s Manual 19
3. HARDWARE SETUP
3. H/W SETUP
Motherboard Settings
2) CPU External Frequency Selection (SYSCLK Switches 1–4)
This option tells the clock generator what frequency to send to the CPU, DRAM,
and the PCI bus. This allows the selection of the CPU’s External frequency (or
BUS Clock). The BUS Clock multiplied by the Frequency Multiple equals the
CPU’s Internal frequency (the advertised CPU speed).
R
A7V266-C
A7V266-C CPU External
Frequency Selection
SYSCLK
CPU
AGP
PCI
100MHz
60.67MHz
33.33MHz
(JumperFree Mode)
140MHz
70MHz
35MHz
133.33MHz
66.67MHz
33.33MHz
ON
1234
ON
1234
ON
1234
ON
1234
WARNING! Set the CPU frequency only to the recommended settings. Frequencies
other than the recommended CPU bus frequencies are not guaranteed to be stable.
Overclocking the processor is not recommended. It may result in a slower speed.
R
A7V266-C
A7V266-C OVER Voltage Selection
OVER2
OVER1
1
2
OVER Voltage
ENABLE
2
3
(Default)
OVER Voltage
DISABLE
3) Voltage Over Setting (OVER1, OVER2)
This jumper opens or closes the circuit to control the use of voltage increases to
enhance CPU performance. The default setting, [2-3] disables the use of “over-
voltage” increases. Switch the jumper cap to [1-2] before attempting changes
with the VID jumpers. NOTE: It is not recommended to use this feature unless
confident that the CPU will not be damaged.