I have a 2.16 GHz Intel Core 2 Duo iMac G5 and I am looking to max out it's memory capacity. I have heard that 3GB RAM is the most this machine can handle. I also heard that you can possible go up to 4GB... is this true? Also, I recently bought a 2GB chip, but it doesn't fit. does anyone know the proper chip specs so that I can switch it out for the proper one. Thanks!!!