Hey all; I get an "IRQL NOT LESS OR EQUAL" whenever I play games for around 5 minutes; other times, it just crashes to desktop, or I'm left with stuttering sound and a black screen with flickering lines on it. I've tried keeping the clock on the GFX cards stable (I'm running two Radeon 4850s in crossfire) and checking if anything's overheating (it isn't). Low graphic-intensive applications work fine. I'm also running a Q6600 and 6GB of DDR2 @ 800mhz. I've attached the crashdump of the BSOD in a zip file. Thanks for any help, and forgive me if this is in the wrong forum.