Even though the AMD Unified Video Decoder can offload CPU usage in HD playback by putting the work on the graphics processing unit, if you're running multiple tasks during HD playback, the system does struggle if it doesn't have the horse power. We don't do it often, but at times we'll be converting files into DivX for sharing, and the CPU is completely maxed out, causing dropped frames during HD playback. For the test files we used, the X3 8750 had no problems with HD and file conversion.