How can I know if my XFX 4870 is runnning at 2d 600mhz clocks or full 750? GPUZ's logger shows the clocks stuck at 600. And even if I use overdrive to force the clocks to 750, under current freq it shows 600. Is it because of a botched Cat installation? An "install failed" message came up near the end when I changed from 9.6 to 9.12.