They have some arch differences, something to do with VLIW 4 vs. 5, or something. For once, I don't feel like looking it up.IMO if the 5 series had drivers like the 6 series they'd probably be on par with each other
Right on. The 6800's are more like the 5800's than the 6900's. In any event, I don't think the much older 5000 series is going to benefit from any driver updates. In fact, after reading the recent Tom's article, I don't think the 6000 series is going to get much of one either.Only the 6950/6970/6990 have the arch differences. The 68xx are exactly like the 58xx series except with less shaders