I just got a brand new computer, It plays Mirrors Edge and CoDWaW with all settings to the max. But when I try to play 720p or 1080p videos, the video lags behind the audio. I've tried both .mkv and .mp4 files with similar results. I am using CCCP for a codec pack and I use MPC for my video player. I use this codec pack and player on my laptop which has less than half the system specs and 720p videos play just fine. Thank you for your help in advance.