My GF and I have been using her old PC as a "media center" for a while now, but it's lacking a bit of punch to play full HD movies. Now I'm wondering what part would be holding it back? I know about bottlenecks in games and such, but media playing is not my expertise approx. specs (not at home atm): Pentium 4 3 Ghz-ish Geforce 8500GT/GTO Not sure about the amount of RAM, I believe 1,5-2GB Windows XP, latest Geforce drivers as of couple of weeks ago, same for CCCP Codec Pack The PC is connected to a 32" Samsung LCD TV using 1366*768 resolution (the TV's native res). I used XBMC and MPC-HC to test playback of a 1080p movie, both were stuttering, and I have seen this on a couple of 1080p sources unfortunately. CPU usage is fairly high, around 50% sometimes. I'm looking at the lowest cost upgrade, and my first guess was that a 3XXX series Radeon would help, but I've started to doubt whether that is the actual bottleneck here.