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3. HARDWARE SETUP
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).
1
0
1
0
1
0
A7V266-E
A7V266-E CPU External
Frequency Selection
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.
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.)
1
0
1
0
1
0
A7V266-E
A7V266-E CPU External
Clock (BUS) Frequency
Selection
ASUS A7V266-E User's Manual
SYSCLK
ON
ON
1 2 3 4
1 2 3 4
CPU
100MHz
133.33MHz
AGP
60.67MHz
66.67MHz
PCI
33.33MHz
33.33MHz
CPU_RATIO
ON
ON
1 2 3 4 5
1 2 3 4 5
CPU_RATIO
8X
ON
ON
1 2 3 4 5
1 2 3 4 5
CPU_RATIO
10X
10.5X
ON
ON
1 2 3 4
1 2 3 4
140MHz
70MHz
(JumperFree Mode)
35MHz
ON
ON
1 2 3 4 5
1 2 3 4 5
8.5X
9X
9.5X
ON
1 2 3 4 5
(JumperFree Mode)
19
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