Okay, so I bought a 20" iMac a week ago. I previously had a 1.5 17" Powerbook. Now, the Powerbook was my first mac ever. It ran great, until I started editing video, then it ran like a dog with only 2 legs. So, I bought the iMac in hopes that I'd be able to edit video faster. So far, this new 2.0 ghz G5 computer feels slower then my 1.5 G4. Now, I do only have 512 gig of ram in this new one, which WILL be upgraded to 2 gigs soon. The powerbook had 1 gig of ram in it. Is this why it feels slower? Does RAM really make it computer feel faster? You have to understand, I'm from the Windows world, and from my experience going from 512 to 2 gigs in windows doesn't make the computer feel faster because Windows doesn't hog resources like OS X. I guess I just expected the G5 to feel faster then a G4, but it doesn't to me...yet. I'm trying to be optimistic.