Are you using 12.4? General consensus across the web is to not use them. Please use 12.3 with latest Crossfirex profile even if you dont have crossfire..... I am a victim of 12.4.... It had a hand to some extent in frying my trust good old 4870.... Also, SMC should give you a replacement right now (within a week they should do it themselves, CE does)
Ok, cool... Good to know it does not look like a H/W issue... Anyways, good luck with the card.... BTW, I pushed the sliders in AMD overdrive all the way to right and gained like 6 FPS on an average in Metro 2033.... Since I went from 29 to 35, it made a difference....Its nothing big for me to get a replacement, I am checking the card currently and the issues are mostly drivers and BIOS related as I have read on the net. I have 12.6 Beta drivers...