I have a 680i LT SLI, 7600 GS, 2.13 ghz and 1 gb ram, 22" AL2223W and I've watched a few 720p movies and they all work perfectly in VLC, when I try to watch 1080i and 1080p 90% of the time they don't work, it starts playing but it skips or freezes the image. Is this a problem with my computer not being fast enough or do I need new codecs or something else? Thanks.