so im "testing" the output of a ripped 1080p blu-ray movie on my pc. i plan on viewing it with my hdtv over hdmi. however, im playing the movie which is 35 gigs from my HDD and it plays rather choppy in the action scenes. im using power dvd ultra delux7.3. i have an x1800xt 512 which should be more than enough but my cpu is only 2.0ghz x2. so perhaps my pc simply isnt fast enough or am i doing something wronG???