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AMD Overdrive question

post #1 of 7
Thread Starter 
What does "memory vddq" do in AOD. Mine was default at 1.584 so I thought it was the memory voltage and wanted to raise it to 1.65 before changing any memory settings at all, as I intended on lowering timings, but as soon as I put it at 1.65 and hit apply system BSOD. Is this not mem voltage? and if so why would it crash just raising it that little bit without changing memory timings or speed?
post #2 of 7
VDDQ = The supply voltage to the output buffers of a IC (memory chip.)

EDIT: Don't mess with it. You'll only need to change this if you're doing some extreme overclocking.
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post #3 of 7
Thread Starter 
Oooh. Thanks. So how do you change the memory voltage? When I change it in the bios, cpu-z always shows 1.5v no matter what I set it at.
post #4 of 7
Quote:
Originally Posted by Chuckclc View Post
Oooh. Thanks. So how do you change the memory voltage? When I change it in the bios, cpu-z always shows 1.5v no matter what I set it at.
As to my knowledge, CPUz does not actually show CPU Voltage, except on the SPD Tab.

Though, the voltages displayed in that tab are on the SPD Table, which is not a "live" reading of Voltage, but memory Pre-Sets by JDEC Standards & whatever the company (IE: Corsair) adds.

They are like Pre-set profiles stored on the RAM.

So when you raise your voltage in the BIOS, you should be able to see in the BIOS (once you save and restart) what has changed in a PC Health section.

It's been a bit since I looked at the newer MSI BIOS, but IIRC they do have a section that lists all voltages and temp readings (atleast on the 790FX-GD70 & 770-GD55)
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post #5 of 7
CPU-Z has a live reading of CPU voltage. I watch as mine fluctuates with Cool and Quiet. It's on the first page.

Oh, I see he was talking about ram voltage. No CPU-Z does not show ram voltage. I have a program that came on the CD with the MB that reports ram voltage.
Edited by coonmanx - 6/11/10 at 10:00am
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post #6 of 7
Thread Starter 
Quote:
CPU-Z has a live reading of CPU voltage. I watch as mine fluctuates with Cool and Quiet. It's on the first page
He meant to say mem voltage.

Quote:
They are like Pre-set profiles stored on the RAM
That makes since I guess. Cuz they never seem to move from 1.5 no matter what I do, thanks for the info.
post #7 of 7
No problem.

And yeah, he caught that in his edit.

Like I said, your BIOS will most likely have a section for voltages and temps. which should tell you the live voltage reading of what you're at.
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