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BIOS voltage options MA 790 XT ud4p

post #1 of 3
Thread Starter 
Looking at some of the overclock guides has left me confused as to which voltage affects which component, so can someone help me fill the table?




Northbridge Volt Control >>>>> HT Link Frequency
Southbridge Volt Control >>>>>
CPU NB VID control >>>>> CPU Northbridge Frequency
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post #2 of 3
CPU voltage and DRAM voltage are obvious. CPU-NB voltage is applied to the processor's memory controller and L3 cache, so it helps stabilize higher NB frequency (speed of CPU's memory controller and L3 cache) and/or high memory frequency. NB voltage is applied directly to the NB. SB voltage is applied to the SB. You should definitely never need to touch the SB voltage, and increasing NB voltage doesn't really do much. Maybe at high clocks with lots of devices connected to PCI-E slots it can help stability.

HT Link frequency should be left as close to stock 2000mhz as possible. And AFAIK HT Link voltage would stabilize that, it has nothing to do with NB voltage. So really when overclocking on that board, you should only worry about CPU voltage, DRAM voltage, CPU-NB voltage, and possibly a slight bump on NB voltage.
Edited by Dopamin3 - 5/13/12 at 11:24am
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post #3 of 3
Thread Starter 
"And AFAIK HT Link voltage would stabilize that, it has nothing to do with NB voltage."

Aha, so I should remove the entry that says

Northbridge Volt Control >>>>> HT Link Frequency

and replace it with

Northbridge Volt Control >>>>> Motherboard Northbridge

?

I don't have a BIOS entry for HT Link Voltage.

I was assuming that every voltage control on my BIOS would have its corresponding frequency entry, so it was just a matter of finding which voltage affected which frequency, but maybe that isn't the case and there are voltages for which I have no corresponding frequency entry.

For example, I have Northbridge Voltage and CPU NB VID - but only one frequency readout for Northbridge.

So, do *both* Northbridge Voltage *and* CPU NB VID affect the northbridge - 2 for 1?
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