I never once had a BSOD with my 5870, but I constantly had the grey screen/vertical stripe/looped audio problem. What I am saying is that when I replaced the card with a GTX 285, the problem became constant random BSODs for me at least. I fixed the issue by upping my motherboard RAM voltage from 1.5V (JEDEC) to 1.6V (max Intel recommends). This fixed the BSOD issue that started with the GTX 285. Now since my 5870 is with XFX for RMA, I have no idea if my BSOD fix would also fix the grey screen/vertical line/looped audio crash. It was just a potential fix for you all to try.

May be worth it since I bet most of you have all your DIMM slots filled.