Originally Posted by shadow001
those extra 16 rops on fermi are somehow going to become usefull in that scenario
No, that isn't what I said. If you are bandwidth limited to that point, then it really doesn't matter. In normal gaming scenarios, you are not 100% bandwidth limited 100% of the time.
Tell you what... get a HD7970, downclock the memory to GTX 580 levels, downclock the core to GTX580 levels and then compare the results. If the HD7970 truly has more effective
ROPs, then it should still win by a significant amount. If you don't have a 7970, ask someone who does to run the test for you. Then you will at least have reasonably sound data on which to base a conjecture.
EDIT: *You can also look at the 7970 vs the 6970. The 7970 has a 50% bandwidth advantage over the 6970, it performs 50% better than the 6970. Amazing what bandwidth can do in a completely bandwidth limited synthetic test.