Comentário da 6600GT em relação a FX5900XT,tirado da firingsquad:
"In order to keep manufacturing costs down, the GeForce 6600’s memory interface is 128-bits wide, just like the GeForce FX 5700 Ultra, but thanks to its high clock speed we’re looking at a peak bandwidth figure of 16GB/sec, an improvement of 1.6GB/sec over GeForce FX 5700 Ultra, but falls well short of the 5900 XT’s 22.4GB/sec. This could give the GeForce FX 5900 XT the edge in some titles under high resolutions, especially with AA/AF enabled. NVIDIA hasn’t determined the final memory clock for the GeForce 6600, but it has been confirmed that it will be outfitted with DDR1 memory."
"As it stands right now, the GeForce 6600 appears well poised to follow-up the GeForce FX 5700/5700 Ultra, but it remains to be seen how well it will stack up to the competition from ATI. GeForce FX 5900 XT may give it a tough time in many situations as well, especially with DX7 and DX8 games. Hopefully we’ll have the answer to this question soon, but as exciting as the GeForce 6600 is today, we’re eager to see what NVIDIA has planned next. NVIDIA CEO Jen Hsun Huang has gone on record to say that by the end of the year NVIDIA will have a top to bottom solution of shader model 3.0 products. That means that the remaining months in 2004 should be quite an interesting time for gamers of in all budgets!"
Agora fica uma dúvida com relação a performace conforme esse trechos...pode ser que a fx5900xt tenha performance superior em alguns jogos por causa da largura de banda...