Re: GTX280 stuck at 3d speeds even at desktop.
It is not an Intel Chipset problem. I am having this problem with my 780a 280GTX SLi setup, I did not have this problem on my Intel boards a 975x, P35, and x48.
I notice it seems to get stuck at 3D speeds if I have internet explorer open in Vista, close IE speeds drop down. Simple solution use Firefox.