I'm currently running on a 800 MHz G4 iMac with 512 RAM. I was wondering if i ripped out the accessable 256 modele and replaced it with a 512 one, bringing my ram up to 768, would i see any real performance increase? If so what would i see? Anything else i could do to increase the performance? I don't fancy shelling out £60 to find out it doesn't do anything.