I just got a USB 2.0 emac for nothing that was going to the recycler. The door specs are: 1.25 ghz/256/40GB/Combo "About this mac" shows that it has 512mb RAM installed in one slot, and it is running 10.4.11 Anyways, it seems to be working great so far. I was able to get one stick of 256mb supported RAM from the only other 1.25 ghz machine in the lot - the rest were 700 - 800mhz emacs. Is it OK to mix the 256 with the 512? I've read many places that it is fine, but will it actually boost the speed of apps and things, or should I just leave it as is? I read somewhere that it might slow down the speed between the two RAM capacities - I have no idea! I don't want to spend any money to buy more RAM. Any opinions would be appreciated - thanks!