This round, it seems that nVidia’s got it’s ducks in order. PC Perspective runs eVGA’s 6800GT card through the works.
And here you see our final overclocking results: 420 MHz / 1.12 GHz! These speeds are absolutely awesome and even blow past the default GeForce 6800 Ultra clock rates of 400 MHz / 1.1 GHz. Our board was a retail sample, and though you might not get as high an overclock as you are seeing here, you may get more. Overclocking has always been a of chance.
If you want a good card to handle Doom 3 but don’t want to sell a kidney, nVidia is a solid choice. Review.