User guide

ASUS A7A133 User’s Manual 19
3. HARDWARE SETUP
4) CPU External Frequency Setting (DSW Switches 1–4)
This option tells the clock generator which frequency to send to the CPU,
SDRAM, and chipset. This allows the selection of the CPU’s External frequency.
(The CPU External Frequency multiplied by the Frequency Multiple equals the
CPU’s Internal frequency (the advertised CPU speed).
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. In JumperFree mode, all dip switches (DSW-1–DSW-4) must be set to OFF.
3. 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.)
A7A133
DSW
ON
12345 678910
126MHz
126MHz
ON
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ON
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ON
12345 678910
ON
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133MHz
133MHz
100MHz
100MHz
100MHz
133MHz
120MHz
120MHz
ON
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90MHz
90MHz
CPU
SDRAM
→
→
ON
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101MHz
101MHz
A7A133 CPU
External Frequency Selection
WARNING! Frequencies other than recommended CPU bus frequencies are not
guaranteed to be stable. Overclocking your processor is not advised. It may result
in a slower speed and premature wearing of the processor.
Motherboard Settings
3. H/W SETUP