I just recently purchased a XFX ATI HD4850 512MB video card, and it's been running smoothly. The thing is, however, that when playing some games I see odd little glitches I hadn't noticed before. For example, in BioShock, during the beginning when you see rapture, at certain angles at looking at the tall tower, I see a large block thing that just seems to blend in to the background until I move my mouse to another angle.
It also happens in Team Fortress 2. Here's a picture:
I don't think the card is overheating.. it just seems odd. I believe it's artifacting? Not sure.
Card only running at around 57 degrees. Seems odd that it's artifacting.
C2D E6400 @ 2.2GHz
XFX HD4850 512mb
450W generic PSU
rest is filler.