Hi, i have a 2008 mac pro 2xQuad 2.8 GHz 4GB RAM I just upgraded from nvidia 285 to ati 5870. The FPS in Starcraft 2 did not go up. Its almost exactly the same. I was suprised so i check the CPU usage. Its at 115% (of 800, 100 per core) spred out over the cores. So the CPU doesnt seem to be the problem. There are over 1 GB free of RAM, little disk and network usage. I run 10.6.6 it was just reinstalled before the upgrade. No other download avalible. I tried reinstalling SC2, same. Any ideas?