Product Detail 512Mb PC3200 (400MHz) Single 512Mb module . The "G.Skill Value DDRI Series F1-3200PHU1-512NT - Memory - 512 MB - DIMM 184-pin - DDR - 400 MHz / PC3200 - CL2.5 - 2.6 - 2.75 V - unbuffered - non-ECC" is best product for you. We recommended G.Skill Value DDRI Series F1-3200PHU1-512NT - Memory - 512 MB - DIMM 184-pin - DDR - 400 MHz / PC3200 - CL2.5 - 2.6 - 2.75 V - unbuffered - non-ECC