Ah, I see. Hmmm... I just realized that I upgraded both my kids' computers to the Radeon 6850 and they only have a 300W power supply. I didn't even realize I needed to upgrade that (not so smart on my end it looks like). However, theirs have been running great for a year now playing games like Skyrim and Battlefield 3. What kind of problems can that cause?
Thanks for letting me know!