Hi, I have an iMac G3 400mhz SE (comes with DVD) w/ 128mb currently installed. I've read on some sites that it supports 512mb ram max, and others say 1gig max. I want to upgrade my memory so I can run Mac OS X a little faster . Does the iMac have two memory slots? And whats the max memory per chip per slot? Also, any recommendations on sites with good memory prices? Thanks!