The first night I got my Duron 800, I booted it up FIRST TIME at 8x133 3.6 io 1.85 vcore. Ran perfectly for about 2 hours. I was running SiSoft Sandra CPU benchmarks, Prime 95, Counter-Strike, but I decided to try a little more. Went up to 8.5x133 and wouldn't boot, so I held insert, and put my settings back at 8x133. From then on, I have been having problems. I can get the computer to fully boot, but once I get into windows and run Prime 95, it gives me hardware errors. Right now I am running at 10x100 just fine, but I would rather do 7.5x133. Any ideas?