So then like, hey guys. I believe this is one of my first posts on this forum, but anyhoot. Here's my specs AMD Opteron Dual Core 175 OC to 2.8GhZ w/ Zalman VF-8XXX Cooler 2GHZ DDR 3200 DUAL CHANNEL ABIT KN8 SLi Motherboard Sapphire Radeon 1950XT 256MB Enermax 600 Noise Taker II Silverstone Temjin 06 Case That should give you guys a rough idea of my cooling & power. Anyway. In regards to my OC, it has always been EXTREMELY stable. @ 2.8GhZ I left Benchmarking software running all night, and I would always play games like FEAR, and BF2142 and NFSUMW on good settings, for very long periods of time. What happened is, now that I installed my card, I played F.E.A.R Multi on Max Settings, and then out of nowhere, my computer completely shut off. I am not certain weather it is something with the card, some setting, the OC of the CPU (My GPU is Stock Clocks), or my PSU not giving enough juice. I heard the X1950XT sucks more juice than a 7950GX2. Not sure if it's true. I saw there was a small red LED that turned on the video card when this occured, this is what sparked my curiousity ..... Let me know what you guys think, I'm quite stumped.... Thanks !