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special switches for BIOS features?

Are there special settings needed that allow all of these BIOS capabilities?

I just received this motherboard (after previously rejecting the GA-G31M-ES2L mobo for lack of these BIOS settings) and upgraded the BIOS rev. to F6x. Now, in spite of the fact that I'm running the same GA-G31M-S2L with the same BIOS version, I don't have the ability to set the following:

# PnP/PCS Configuration
Set PCI Latency Timer (CLK) to 128 (maximum benefit is gained when ASIO latency is below 64 samples)

# MIT Settings
Set FSB DeOverVoltage Control to -0.15V
Set CPU GTLREF Voltage Ratio to 0.636 (default) / 0.603 / 0.566 / 0.540 [each to be tested]


In the case of FSB DeOverVoltage, there is control over INCREASING the Voltage (i.e. FSB OverVoltageControl) but none for decreasing the voltage. In the other two, PCI Latency Timer and CPU GTLREF, these settings do not show up.....

Is there something more I need to do to allow me to change these?

Thanks,
Chris

p.s. I may need to modify my other post about the GA-G31M-ES2L saying that it may not be optimal. In light of the above, it may be just as capable as the recommended mobo....


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