DDR SDRAM vs. PC-100 or PC-133 SDRAM

 

To find out which iMac Flat Panel version you have:

about this mac Select "About This Mac" in your Apple Menu.
sdram SDRAM means you have the iMac Flat Panel that runs PC-100 or PC-133 SDRAM.
ddr sdram DDR SDRAM means you have the iMac Flat Panel that runs DDR SDRAM.