A HD6870 is more or less like an HD5850, and those Anandtech benchs leave it in the dust compared to the HD7870, not so much against the HD7850 though. I'd say that the first choice, the HD7950 is a very nice upgrade, taking in mind newer games (since that's what we aiming at when buying hardware, remember? Tesselation, DX11, the good stuff! ). HD7870 is a fine upgrade nevertheless, though i agree that the HD7850 isnt so nice given the performance gap in between those cards. Power consumption of both cards is very low. I think the HD7950 is around 170w or so. HD7870 should be a little less. Nothing that a good 500W PSU cant handle, nevermind a 750W PSU.