Hello, I have a 20 inch intel based iMac. Its the 2.16 GHz Intel Core 2 duo model. Under the Memory in the About this Mac panel it says I have 1 GB 667 MHz DDR2 SDRAM. I am curious what the maximum amount of ram I can put into this Mac. Is the 1GB card it came with one card, or 2 512's? I wanna get her up to max ram asap because im upgrading to OSX 10.5. Any suggestions on where to buy ram would be appreciated too! Thanks a lot in advance!