While playing Starcraft 2, there's a cutscene (rendered) that has always choked at one graphics-intensive part. I have an overclocked 6950 2GB; on paper, it shouldn't be a problem for the card/system.
Two recent things led to seamless performance in this particular cutscene -- closing the program "Actual Window Manager" (which I suspect hooks the GPU/Windows desktop management in some way), and setting the compatibility to "Disable desktop composition".
Could this just be a placebo or random luck? Or does desktop composition take away from the GPU's performance?
And additionally, would I get even better performance if I also disable "Visual Themes" (theoretically)? I don't know what the difference between them is.
(Of course, I can and will test them out in practice, but it'll be difficult to judge if disabling visual themes will give minutely better performance).