I had an overheating problem with my Crossfire 4850s (temps were getting up to 110 C) that I got under control, but my computer keeps shutting down during gaming and I'm not sure what the problem was. I dialed back my i7-920 to stock settings (I set everything to Auto on my motherboard (p6t)) and I ran memtest . I was playing Bad Company 2 and there were a few horizontal lines on the screen and eventually after about 20 minutes I got a bluescreen. I've had the computer for about a year and this is the first time I've started having problems. Any ideas?