Hi. I recently bought an eMac 1,25Ghz and wanted to upgrade its RAM with two 1Gb dimm's. Later I discovered I didn't support 1Gb dimm's, is that correct? Since I want to put it max RAM I would need 2 512Mb RAM. I found at Apple Store that for 256 they use PC2700 and for 512Mb PC3200. I think the difference is the speed can I buy PC2700 or 3200? If I buy it in other place than Apple what should I ask for? What's the U stands for in PC2700U or PC3200U? In which other Apple computers can I use this 2 dimm's I've got? Thanks for the help.