Sorry, I use the mobo's onboard video (GeForce 6150
As stated in a very long post previously, true HD 1080 needs at least a 6600GT or ATI equivalent to run without stutter when outputting.
There is another thread dealing with the new ATI HD 2000 series of Graphic cards, which need some feedback on these from real users, rather than reviews, but they may be a better bet (if ATI's drivers are upto it).
ps my dualcore makes no significant difference to HD playback, the video card i install does, if I go back to a 7300GS I get stutter, on 7900GS no problem what so ever.
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