I have finally found the coulprit to my oc problems. I pulled out to of my 4 sticks and now i have a stable OC with prime 95 for 24 hours . x64 3000+ 280.8 @ 9.x Multi Htt 4 and Mem to DDR333 not DDR400. With 3DMark 2001SE I get a score of 6660. Not bad but still room for improvement. I started to oc my video card and was wandering off stock cooling how hot i should let the heatsink get to. I have a IR temp that reads it as 126.7F non oc running 3DMark2001SE. I uped the setings mem and core 10mhz each and got a score of 6890 with no problems but i don't wanna cook it. Any one know how hot i should let it get? I have a 120mm fan exaust in back and 1 80mm fan side for intake as well as what the PSU pulls in. I had to take out the front intake of a 80mm fan in front of my hdds. Thanks for your help/advice. Please help