Asus A7V266-MX 1.CPU external frequency selection (SW1 Switches 1-5)

1.11Switch 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.

		DSW
	ON	ON
	OFF
		1	2	3	4	5
	1.Frequency Selection
	2.Frequency Selection
	3.Frequency Selection
A7V266-MX
	4.Frequency Selection
	5.Frequency Selection

A7V266-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.

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).

		DSW
			ON							ON
			1		2	3	4	5		1	2	3	4	5
	CPU			100MHz					133.33MHz
	AGP	66.67MHz							66.67MHz
	PCI	33.33MHz							33.33MHz
A7V266-MX
			(Default)

A7V266-MX CPU

External Frequency Selection

The default CPU external frequency is 100MHz. If your CPU supports 133MHz external frequency, adjust the DSW settings before installing the motherboard.

Set the CPU frequency only to the recommended settings. Frequencies other than the recommended CPU bus frequencies are not guaranteed to be stable.

1-14 Chapter 1: Product introduction