TS (Hi-Def MPEG-2) Files and Video Cards

I have tried 2 video cards, both PCI-Express and here are my observations when playing TS files:-


ATI Radeon X700 Pro:-


Silky smooth when playing 1080i video (60i) and 720p.


Terrible when playing 1080i film (24p 3:2 pulldown), especially with high bit rates and complex scenes. Lots of judder. I wonder why? Is simple 3:2 inverse telecine so hard?


Nearly always a grey bar at the bottom when playing. About 4-8 pixels high and running across the entire width. Very annoying!


NVidia 6600GT:-


Silky smooth for ALL HDTV TS files.


No grey bar at the bottom.


BUT random judder! Every 3-5 seconds a few frames skip for no apparent reason.


ALSO I can't get the Gamma curve to work. My projector really needs this boost, but I have tried ALL drivers from 66.93 to 75.90 and no gamma.


Apart from TS files for regular DVD, I notice:-


NVidia is sharper and more detailed. But ATI has better colors.


And the NVidia de-interlacing is AWESOME, while the ATI de-interlacing SUCKS in comparisson.