I have a realmagic HW + and I am noticing that playback is jerky. I do not understand why, since my computer is fairly powerful, and the HW+ shouldn't care how fast the system is, but vob files play back oddly. Some movies that I have tried to play from my hard drive that have screwed up: Emperor's New Groove(playback of movie sometimes will not play at all, and when it does play, the video corrupts and refreshes to good quality every 10 seconds or so), Tombstone(Jerky, skips ahead). I have also tried to play back the vob's with ATI's file player (also hardware decoding via the Radoen 8500) and I have the same results. Why is playback jerky?

On a side note, I notice the same "jerkyness" when recording video. What is wrong with my system??? (Jerkyness does not appear to be dropped frames, playback just is jerky).

MSI K7T266 Pro2
Athlon XP 1600+
2x 256MB OCZPC2400 DDR RAM
Epox RAID card (slot 2)
Dual Western Digital WD400BB hard drives in RAID0 config
Single WD153BA boot drive
Hollywood Plus (slot4)
D-Link 10/100 (slot 1)
Soundblaster Live! (slot 3)
Pinnacle PCTV Pro (slot 5)
Radeon 8500 RETAIL
Teac 512EB 12/10/32
Toshiba SD-M1612 16X DVD
500 watt crapUSA power supply
Computers divine Alaska Full Tower + cooling option case