I know there's a lot of threads talking about the time taken to encode a file in handbrake etc, but I'm looking for thoughts on the difference in speed between my 2 systems. I have a Core Duo (not 2), 2.0 Ghz iMac at home and at work I have a Core Duo 2, 2.2 Ghz DELL laptop (unfortunately!). I have an episode of the X Files roughly 45 minutes long that I ripped from DVD. Using Handbrake on my iMac with the Mpeg4 codec it encodes at an average of 11 fps and estimates 1 hour 34 minutes to finish the job. On the DELL, Handbrake encodes at an average of 130 fps and does the same episode in around 7 minutes! If I change to H.264 the DELL can do the job in as long as it takes to watch the episode i.e around 45 minutes but with my iMac we're talking about 2+ hours. Obviously the laptop has the more modern processor but I didn't expect it to be THAT much better. Is it really down to the differences in processor or is something not quite right on the iMac? The only difference between the 2 systems is that I don't have leopard therefore I can't run the latest Handbrake whereas on the DELL I am running the newest release. Any thoughts?