Pardon the NooB if this has been covered... My new ASUS EAH4850 TOP comes overclocked at 680/1050, but seems to run at 500/750. When using SmartDoctor, I can get it to go to 680/1050 but it is only temporary. And another anomoly - when I do 3D-Graphics Test in PerformanceTest v6.1 it shifts back to 500/750. It does the opposite when I use dxdiag and do the 3d tests. Any insight on what is going on and how I can be sure I'm running at the maximum rates? Thanks.