This has probably been asked before, but since I can't type "12" into the search function I can't look for a similar post. I have a RevA PB (867 G4) that right now has 640 MB RAM. I Added a 512 stick to the original 128 that is attached permanently. Question is this, what would be the approximate speed increase, of dropping the 512 and picking up a 1GB stick. Would it be worth it on a RevA or should I just stick it out with 512 until I get a new computer down the road. I am slowly getting into some basic video editing and music production, all on a college student's budget. The PBook serves me well for most everything but gets a little sluggish with iDVD 4 and iMovie. How much of this is related to processor speed and how much is RAM? Also I'm probably going to attach a FW Hard Drive soon. Will this affect RAM consuption at all? Thanks for any tips.