I did try Thermaltake (ugh, but it was available locally) solid copper ramsinks on the VRMs...with those on they were hitting 95c in Assassin's Creed and Crysis and higher on RTHDRIBL/Atitool/Furmark.

A week of those temps killed my card...it won't game for more than two hours at it's stock speed of 795/1100 now. So I don't recommend stressing the cards to heavily if you're running this cooler until something is worked out to cool these VRMs.

I just said screw it and I'm exchanging my 4870 for 4850 Crossfire :P
I bet those won't need a cooling system so complex it doesn't exist

I did not try the bottom half of the stock cooler, but after trying to take it apart and almost ruining the screws because I didn't have a screwdriver small/flat enough, I decided better not.