i'm guessing your trying to say the 6950, and btw you can unlock its shaders and overclock it to the exact same performance as the 6970, and on a rev i saw it actually had lower temps than the 6970, but for ati v nvidia, just the brand, both kick but, for the price diffs, some have better cooling and are pre-overclocked and they don't even take them too far that way though, the cheapest cards as long as they are reviewed well will be fine, sometimes a model can tend to be deffective compared to another brand for the same price.