newer technology compared to the 6800 ultra which has been out awhile.
you will have 24 pipe lines compared to 16 of the ultra. (more is better)
higher clock frequencies make for better performance.
doom 3 on the highest settings needs the 512mb gpu, there is really no difference between this setting and the regular high setting.
only game on the market to actaully use up to 512mb of video ram, 256mb is enough, trust me. games only require 64mb, and many people (including me) get away with 128mb of it. the good benefit of having 256mb of the gpu ram is the speed of it, 256 bit compared to 128 bit of 128mb cards.
So, which would be a better video card? The 6800ultra with 512mb memory on it or the 7800GTX with 256mb memory on it?
It seems to me that even with the great specs that the 7800GTX is getting, it still will not be able to run Doom3 or any game using the D3 engine to it's full potential, because it lacks the required 512mb of memory. Or, because the 7800GTX is so fast, will it actually max out Doom3?
I wonder if I should just wait until the 7800 ultra comes out, hopefully that will have the 512mb on it, but I can't believe what that will probably cost!