Hello everyone, Can someone tell me, or tell me where to look, to see how much memory my uncles iMac can handle. It's a Summer 2001 500MHz G3. It came with 64Mb built-in and he's got a 256Mb chip in there as well. He's gonna upgrade to OSX and wants to have at least 512Mb. Is the 64Mb chip removable? David Crandon