Help with bios voltages and stability

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11 Sep 2007
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9
Hi all,

I built a PC about a year ago. I've been having some random freezes, lock-ups and BSODs in games and in Windows. These have gotten worse over the last 2 months or so.

I've run the usual tests (FurMark, Prime95, memtest, HDD checks) and swopped in different sound and graphics cards. I've also been posting the BSOD mini-dump files on sevenforums. The conculsion is that, its either a faulty motherboard or PSU or my bios settings.

I put a new PSU in a week ago and its been more stable, but I still experienced a freeze at bios bootup and, upon reset, the message "overclocking failed, press .. to load defaults or .. to enter bios setup".

I want to therefore check my bios settings are correct, in particular the voltages. My motherboard is "Asus Crosshair III Formula AMD 790FX (Socket AM3) PCI-Express DDR3" and my RAM is "Corsair Dominator XMS3 4GB (2x2GB) DDR3 16000C9D Twin3X, 9-9-9-24".

What I'd like to know is what voltages (i.e. CPU, RAM, North Bridge etc) and other important settings should I be using in the bios to maximise stablity and to hopefully stop these lock-ups/ problems ? My RAM needs to run at 1.65v as stated on the sticks themselves, so I've set that ok, but I worry that the CPU voltage and other settings need tweaking.

Note I'm not really looking to overclock at this stage, I want to maximise stability first.

Thanks very much in advance!

jm.
 
The things to check with are CPU-z and HWmonitor to check what voltages and temperatures are like currently. Under load with prime is best.
You do not say what CPU? generally with an AMD, 1.3-1.4V would provide stability, other voltages, I set to auto in the bios even with an overclock. keep CPU <1.5V regardless.
 
Thanks for the reply. Sorry, I should have said my CPU is:

AMD Phenom II X4 Quad Core 955 Black Edition 3.20GHz (Socket AM3)

I have my CPU voltage at 1.35v currently.

Thanks,

jm.
 
Last edited:
1.35 is Ok, what is it in CPU-z under load, is it on auto in bios? You could easily go up to 1.4V without an issue if your temperatures are not too high.
As said, I leave voltages at auto except for ram 1.63V and CPU which I undervolt by 0.1V this shows 1.26V under load with CPU-z (1055T @3500).

andy
 
I've set my RAM to 1.65 v and my CPU to 1.35 v. I also set my RAM frequency to 1600. Everything else is on auto.

I had a lock up this morning when I kicked off FurMark - the screen went black and I had to reset, but the fans were still working inside the case.
 
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