Originally Posted by wudaddy
Even though I have a 6800, I would still say that you should go with the 6600gt. The 6600gt has GDDR3 RAM that operates at a very high frequency, well powering the 6800xt which only has DDR1 RAM, not to mention the core clocks on the 6600gt is also higher than those of the 6800xt. Unless of course you can unlock the 6800xt and somehow make it equivalent to a regular 6800. This is how I view the rank: 6600le<6600<6800xt<6800le<6600gt<6800<6800GS<6800G T<6800ultra<7 series. At stock, the 6800xt and 6600gt both have 8 pipelines, and the 6800xt only has 1 more vertex pipe. Are you able to unlock the rest of the 6800xt's pipes? Well if you want to take the chance then go for it, otherwise to play it safe I would choose the 6600gt.
You forget that the 6800 has 256bit ram, it's irrelevant that it's ddr1 as it still has more bandwidth than the 6600gt. The core clocks are also not very significant since the 6800xt has 12 pipes (depending on which 6800xt you buy, on newegg the cheapest is 12) in contrast to the 6600gt's 8. Also, 6800 core's also have a good bit higher % overclocks than the 6600gt's which don't oc well at all.