I wouldnt draw such a hard, fast rule between them like that. At anything under 1650x1400, the 320MB will do just fine. The 640 may do a little better at the higher end, but at 1440 and 1280, the difference isnt even worth worrying about.
The 320 will be good for you all the way up to 1680x1050. At 1680x1050 you need to start considering a 640. Although there is no point in getting a 640, as the 2900XT is only $40 more and performs much better.
The 320 will be good for you all the way up to 1680x1050. At 1680x1050 you need to start considering a 640. Although there is no point in getting a 640, as the 2900XT is only $40 more and performs much better.Zaber123
The 320 will be good for you all the way up to 1680x1050. At 1680x1050 you need to start considering a 640. Although there is no point in getting a 640, as the 2900XT is only $40 more and performs much better.Zaber123
If you don't mind the very noisey fan and increased power usage, the 2900xt is better. I went for the 8800gts 640 becuase it's almost silent!!
It just means a given level can contain up to 500 MB of uncompressed textures. Any given scene only uses 1/10th of those textures. The unused textures can be swapped between the video ram and the main memory. If you don't have enough video ram and/or a slower PC, this swapping causes slowdowns.
Any modern gaming PC can run Doom 3 at ultra settings without a hitch these days.
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