Well, I can see improvements in vm's when I do this. Some games also run smoother.
I have a couple games that run rather slow on my amazing hardware, maybe I should try this.. I Am Alive is a big one. I'm pretty sure it's only supported on Win7, but it's very choppy on lowest settings on Win8, even in compatibility mode. Metro 2033 is the same way, but I can get it to run smooth by dropping the settings, which absolutely breaks my heart because I can run some pretty intense games on highest settings:( maybe its an NVidia thing?