allright,i understand. but what should i upgrade to make my quad core q9550 2,83ghz and nvidia geforce 9800gt 1gb ram and HDD:1TB-10000rpm edit hd video in realtime?? on my configuration, premiere only works as CS4 version,earlier version won’t work. what should I do to edit avchd 1920×1080 in realtime with premiere cs4 ?