hi again . i know that this problem i having now may related to some other forum but since its connect to the previouse one i post it here ... so after i install the sound driver i got a sound but when i play a 720p x264 movies (with vlc player or mplayer classic) its flicker, BUT when i disable sundmax from device manager the movie play smooth but of course without sound .... any thoughts ? is there something i can do or this is a sign for an old pc that cant hadle 720p x264 files?