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Overclocking amd phenom II x4 955


Mar 30, 2009
Amd Phenom II x4 955 @ 4ghz at 1.5v
biostar ta890fxe
4gb ddr31600
sapphire hd 5850
rosewill extreme 750w power supply
cooler master v8

I have recently overclocked my cpu, i have gotten it to boot and finally be able to run bench marks, i can complete most of my benchmarks at 4ghz(mulitplier at 20) i just have a question, is 1.5v safe, i have temps no hotter than 55c on load. i can get the pc to boot and play games but crashes after a certain amount of time with other voltages other than 1.5, is it because of the voltage not being high enough or just not stable.


Apr 9, 2009
1.5v is as high as I would personally like to go. I know some run perfectly fine at 1.55, but not all chips are the same and some can't take even a single voltage increase. How stable are you in prime95?

Can you run 100% stable at say 3.8GHz? If you can run at 3.8 I would suggest just dialing it back to that.

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