Product Detail 1GB DDR RAM PC3200 desktop memory module 184 pins, non-ECC 400MHz memory speed, CL3 latency Lifetime warranty . The "Transcend JM388D643A-5L 1GB JetRam DDR400 DIMM" is best product for you. We recommended Transcend JM388D643A-5L 1GB JetRam DDR400 DIMM