I have recently been tinkering with my Phenom II to try and get some better performance out of it, and recently encountered a weird problem.
I was able to reach a stable OC of 4.0Ghz at 1.35v, but I was experiencing some crashing in Squad due to low voltage, so i tried to bump it up to 1.40v.
After this, when I restarted my PC core temp showed core #0 overclocked to 4.0ghz, but every other core back to it's original 3.4ghz, and the CPU was still running at 1.35v. I tried changing back the voltage, but the same problem persisted. I completely reset the bios settings, launched windows at 3.4ghz, then re-OCed to 4.0ghz @ 1.35, but still, only core zero was OCed. I reset the bios one last time and put in the OC for 4.0 @1.375v, and this time I booted back into the bios to check the M.I.T system status, which showed all four cores overclocked with a voltage of 1.375, and temperatures below 40C. I got my hopes up, but when booting into windows to my dismay I was greeted with only one overclocked core, running at 1.35v. I've spent a couple hours trying to figure this out so any help would be appreciated.
My specs:
AMD Phenom II X4 965 BE
Gigabyte 990FX UD3
8gb Crucial Ballistix Sport
MSI Twin Frozr GTX 760
750W Corsair PSU