Hello all! So I have late 2009 27' imac, running ati 4850 vga. lately vga started to throw out artifacts after sometime of playing or doing video editing, so I think my vga is dying... Tried to reset PRAM, didn't help, worked fine for a half an hour, but after playing diablo 3 for a few mins artifacts appeared again, same in bootcamp. So I thinking of upgrading my vga to ati 6970m, but for an apple branded card price is insane. I was thinking, maybe its possible to reflash vga cards BIOS to apple bios? Because you can get a 6970m from dells alienware for a half price of apple. Maybe somebody tried it? thank!