I'm looking to get a new video card now that some specs for 14 are out(I know don't speculate). I currently have two defective 4870's that crash in 3D application/games in reference to a file atikmpag.sys or something, I heard 4870's can be a pain. I've actually had 3 different 4870's from 3 different companies do the same crash, NVIDIA works fine. I want to know if a 5770 would also likely crash my PC since I heard they are almost the equivalent of a 4870. Juggling video cards = and I don't want to buy and RMA another card.
Some specs:
E8500
Sapphire 512MB 4870/Asus DK 1GB 4870
Vista 64-bit Home Premium
4 GB RAM
850 PSU
And also pretty good air cooling