Well I got my Opteron today, it is a 0551 CCBWE UPMW, and this thing just will NOT go higher then 233x9 @ stock voltage, I tried 240x9 at 1.475 and I just BSOD or lock up. It is not a memory issue due to the fact that I had a 3800+ X2 @ 2.4GHZ before I put this in (240X10). Anyone have any ideas? I am idle @ 33C with stock cooling atm. jumps up to around 40C with 2 primes running. Motherboard is an Asus A8N-SLI Premium, 600W OCZ Powerstream, BFG 7800GT. This was a CPU I got from a gentleman that claimed 2.7GHZ @ 1.450, while I understand I might not get this high, I should not be getting this low.