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Chapter 1: Product introduction
A7V266-MX
®
ON
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A7V266-MX DIP Switches
DSW
ON
OFF
1.Frequency Selection
2.Frequency Selection
3.Frequency Selection
4.Frequency Selection
5.Frequency Selection
1.11 Switch and jumpers
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.
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.
1. CPU external frequency selection (SW1 Switches 1-5)
This option 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).
Set the CPU frequency only to the recommended settings. Frequencies other
than the recommended CPU bus frequencies are not guaranteed to be stable.
The default CPU external frequency is 100MHz. If your CPU supports 133MHz
external frequency, adjust the DSW settings before installing the motherboard.
A7V266-MX
®
ON
12345
ON
12345
A7V266-MX CPU
External Frequency Selection
DSW
CPU
AGP
PCI
133.33MHz
66.67MHz
33.33MHz
100MHz
66.67MHz
33.33MHz
(Default)