Okay, so my Mac has been acting up for a while now.... freezing up or acting kinda slow. Pretty random. No viruses or things like that are the problem. And I've run Norton SystemWorks a number of times. The problem persists and I am wondering if it's a memory problem. Here's the deal... I've got a PowerMac G4 466mhz running OS 9.1. I've got 3 slots for RAM on my system. I've got one 128MB and two 512MB chips in there right now (the 128 was original with the computer; the 512's I purchased through MacWarehouse). When I was having terrible issues with my computer I broke down and called the tech support people at Apple. In discussing memory they told me that my system was only designed to use 128MB or 256MB RAM chips - and not 512. But MacWarehouse says that their 512 chips are designed to work in the G4 466Mhz. So who's right? Should I take out the 512 and replace them with 256? Is my computer destined to be maxed out at only 768MB of RAM (256 x 3)? I'd hate to have to go out and spend over $100 on more RAM... considering I just purchased a 512 not that long ago (and now it would be useless).