The Asus M4A78 pro started to keep giving BSOD almost all the time and finally gave up on that board, returned it and bought a Gigabyte MA790GP-UD4H DDR2 Memory board. Since I already had boat load of DDR2 memory this board made sense. Initially I orderd the MSI DKA790GX (regular) board to pick it up from my local Microcenter. Then I saw this board sitting all alone in one corner with no takers. Asked the sales person (who I know and trust) and he said 'stay away from MSI if possible' and he said if he had a choice he would go with this Gigabyte. Ok I will shut up on the story. Went to Frys to pick up a 550 BE to try my luck in unlocking (tho the board was bought to build a stable system with my trusty PII 805/810). Installed the proc and board booted with F1 bios as unknown processor. Went into bios and turned on ACC, voila the bios post message said X4 B50, I thought woo hoo I too am lucky, but that crap didn't want to boot into Windows (tried both W7 64 ultimate and XP SP2 32). So increased the voltage upto 1.5v and NB up .2v, nothing, windows failed to load. Updated to latest F6 bios, new feature Hybrid ACC, so turned that on, set the ACC to auto, still the same result, over volted etc, same result. Reduced the HT all the way to 1GHz, NB and CPU to 1Ghz still the same. So I guess I got a 'Bum' core. But with just 2 cores I am at 3.8Ghz with default voltage on the cpu. Should I try earlier bios or I should give up? Am I doing anything wrong here? I think the board is capable of unlocking and have seen on other forums people using this board. Let me post a pic of the CPU.