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Originally Posted by cr4zy
Gddr3 is better for overclocking because it does in fact run cooler but it has higher latency timings and therefore requires higher clock speeds.
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Oooops I think you meant lower latency...
Anyway, there is GDDR3 which runs slower than DDR, so that's not necessarily true. 300MHz DDR is just as fast as 300MHz GDDR3 - there's absolutely no difference. Likewise, 320MHz DDR will perform better than 300MHz GDDR3.
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You can also unlock the full 16 pipelines
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False. This is only possible with 256MB 6800NU's (which are downclocked + crippled 6800GT's) and the success rate is very low. Unlocking pipes works with the 6800GTO though.
256MB 6800NU's are
a) very expensive
b)
much less common than 128MB 6800NU's
6600GT also has the advantage of being SLi capable, and having a working purevideo processor.
fedz