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ASUS A7V266-M motherboard user guide
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4.4 Advanced Menu
CPU Speed [Manual]
When the motherboard is set to JumperFree™ mode, this field allows you to
select the internal frequency of the CPU. Select [Manual] if you want to make
changes to the two subsequent fields. Note that selecting a frequency higher
than the CPU manufacturer recommends may cause the system to hang or
crash.
CPU: System Frequency Multiple (when CPU Speed is set to
[Manual])
This field applies to unlocked processors only. If your processor frequency
multiple is locked, you cannot access this field. This field sets the frequency
multiple between the CPU’s internal frequency (CPU speed) and external
frequency. Set this field in conjunction with CPU Frequency (MHz) to match
the speed of the CPU. Configuration options: [5.0X]...[14.0X]
System / PCI Frequency (MHz) (when CPU Speed is set to [Manual])
This feature tells the clock generator what frequency to send to the system
bus and PCI bus. The bus frequency (external frequency) multiplied by the
bus multiple equals the CPU speed.
System / SDRAM Frequency Ratio [Auto]
This field determines whether the memory clock frequency is set to be in
synchronous or asynchronous mode with respect to the system frequency.
The options that appear in the popup menu vary according to the CPU
Frequency (MHz). Configuration options: [Auto] [100:100] [100:133]