I know that not all will unlock but after reading many posts it seems that the majority do. My MB is a GB MA785GM-US2H running Win7 64bit. Runs fine as a dual core but with all 4 cores unlocked and with my ULTRA 500W PSU it won't boot (it will POST) into Windows. I was able to disable core 1 and unlock core 2 and 3. Now it shows as a Phenom X4 B55 with 3 cores. After some more reading, I suspected I had a PS problem because my PSU only had a 4 pin CPU power plug (MB has an 8 pin). I bought a ANTEC 500W PSU which has a dual 4 pin CPU plug. With either the 8 pin or 4 pin plugged in, the computer would POST but not boot. Just a blank screen after with Windows logo started to appear. I put back in the old PSU and can still boot and have a triple-core. Do you think with a better/higher wattage PSU I could unlock all 4 cores?
Thanks!
Thanks!