The Office pc with a Radeon 5770 and the i5 is smooth as butter, but still suffers pixelation on the 1080i streams. I can't imagine the HTPC is struggling for CPU horsepower now, so will the GPU be the bottle neck?
Shift-1 with LAV enabled shows massive frame drops but I don't know why the picture is sometimes pixelated and sometimes not. It also happens with DVBlogic in Windows Media Centre using Acamd and DVBLogic TV Source.... Confused I am! Any help would be appreciated!
Edit: Forgot to say that I'm going to try the 5770 in the HTPC and see if that makes it smooth... Try and see if the GPU is the problem.