To be honest, this data was after polishing Win7 quite a bit. I gained a lot with that. And, after the latest update that I've installed last week (or this weekend, can't remember) to PD8 it got better, but still. Pls, have a look at the screen shot. 0% Win7 and constant 13-14% of 1 core. If I put the Win7 guest using only 1 Core and 2GB RAM with DX9, that Parallels process goes down to 0-1%.