Kingston Technology 2 GB Memory for Select Imac G5 Desktops Single (Not a kit) 533 MHz (PC2 4200) 240-Pin DDR2 SDRAM KTA-IMAC533/2G Includes one 2GB module of 533MHz DDR2 Desktop memory for Apple Works with imac g5 17 inch 1.9 ghz and 20 inch 2.1 ghz Memory designed, manufactured and tested to the specifications of each particular brand name computer system From the industry leader in PC memory 240-pin DIMM type