I'm running dual Athlon 1.67 gigs with a gig of memory. My timeline and the preview frame at the top takes what seems like eternity to refresh. Occasionaly the preview will keep up with my marker on the timeline but these times are very few. I am rendering a movie right now and it doesn't seem to be using both cpu's so I'm not sure what the problem is. I even set it to only use one cpu and that didn't help either. Please Help Thanks!!