Switch And Jumpers - Asus A7V400-MX/S User Manual

1.9

Switch and jumpers

1. CPU external frequency selection (DSW Switches 1-5)
The motherboard frequency is adjusted through the DIP switches. The white
block represents the switch position. The illustration below shows the ON and
OFF positions of the switches.
®
A7V400-MX
A7V400-MX DIP Switches
The option to set the CPU core bus frequency multiple is available only on
unlocked CPUs. If you are using a locked CPU, setting the switches does not
produce any effect.
The DSW switch tells the clock generator what frequency to send the CPU.
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).
The default CPU external frequency is 100MHz. If your CPU supports
133/166MHz external frequency, adjust the DSW settings before installing the
motherboard to the chassis.
®
A7V400-MX
A7V400-MX CPU
External Frequency Selection
Set the CPU frequency only to the recommended settings. Frequencies other
than the recommended CPU bus frequencies are not guaranteed to be stable.
ASUS A7V400-MX motherboard user guide
DSW
ON
ON
OFF
1 2 3 4 5
DSW
ON ON
1 2 3 4 5 1 2 3 4 5
CPU 200MHz 166.67MHz
AGP 66.67MHz 66.67MHz
PCI 33.33MHz 33.33MHz
ON ON
1 2 3 4 5 1 2 3 4 5
133.33MHz 100MHz
66.67MHz 66.67MHz
33.33MHz 33.33MHz
(Default)
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