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Help! CMOS reset made CPU voltage 1.8, and I can't change it!

907 Views 3 Replies 3 Participants Last post by  dcstrom
I have a MSI K9N2 SLI with Phenom II X4 945. Ran well, installed Win7 but core clock speed was only 800Mhz. I set the multiplier to 15x in BIOS, but then system wouldn't boot. Cleared the CMOS. Computer booted fine but fans are running hard.

I realize at this point I need to update bios from 3.3 to 3.5 to get support for this CPU... however, checking BIOS to see why fans are working overtime I seen that CPU voltage is at 1.8 (should be 1.3) and system temp is 78C! What's worse, it won't let me change the voltage.

So I figure if I'm going to do the BIOS update I have to do it quickly and with a big fan pointed at the CPU. It will still boot into Windows 7. I have the Windows BIOS update tools and this would definately be the quickest and easiest way to do it. BUT... does anyone know if this works with Win7?

Alternatively I could probably find an older CPU that I don't care about (and that maybe uses a higher voltage anyway), do the bios update and then reinstall the X4.

Any better ideas?


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Try updating the BIOS again. If that doesn't change anything I would try pulling out the CMOS battery for about 30 sec, might help. Other then that I dont know what else can be done.

Hope this helps.
It will withstand 1.8v for a bios flash for a few minutes. It also could be a misread.
OK, updated the BIOS to 3.5 via a bootable USB. A bit hair-raising, (fingers crossed don't crash please!). CPU temp was up to 84C by the time I rebooted after flashing was complete.

However... voltage was still at 1.8 with no way to change. I set Failsafe Defaults, no change. Then tried Optimized Defaults, and the voltage went back to AUTO. Phew! I'm sure I tried that before and it didn't work.

Anyway all seems fine now, CPU temp at 44c which I assume is about right for a Phenom II with stock cooler.


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