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ASUS A7V266 User’s Manual 19
3. HARDWARE SETUP
3. H/W SETUP
Motherboard Settings
2) CPU External Frequency Selection (DIP_SW 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).
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.
A7V266
01010 1
A7V266 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
A7V266 CPU External
Clock (BUS) Frequency
Selection
CPU_RATIO
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
ON
12345
CPU_RATIO 8X
CPU_RATIO 10X 10.5X
8.5X 9X 9.5X
(JumperFree Mode)
A7V266
01010 1
3) Manual CPU Ratio Settings (DSW Switches 5-10)
Set DSW switches (5-10) to use the clock multiplier to coordinate the ratio of
bus speeds with CPU settings. Set the DSW switches according to the internal
speed of your processor and the bus frequency (133/100MHz).
IMPORTANT:
1. To use this feature, JEN must be set to Jumper Mode, [1-2].
(See 1, JumperFree™ Mode (JEN) in 3, HARDWARE SETUP.)
2. When JumperFree mode is enabled, use BIOS setup in place of these switches.
(Set Operating Frequency Setting to User Define under 4.4 Advanced Menu
in BIOS Setup so you can set the CPU Frequency.)