Well a fried of mine wants to sell me a 256 MB card of DDR SDRAM, PC 2100. But my computer takes DDR SDRAM, PC 2700. I don't think this would work since he is trying to sell me a PC 2100, and my computer is 2700. Could sombody tell me (or point out an article on the internet) if it is possible to put a 2100 card in a 2700 slot? I bought my iMac (FPD) in late November, and was after the the updates. (USB 2, DDR SDRAM).