Crucial CT8G3ERSLD8160B 8GB DDR3 SDRAM Memory Module - 8 GB (1 x 8 GB) - DDR3 SDRAM - 1600 MHz DDR3-1600/PC3-12800 - ECC - Registered - 240-pin - DIMM - 1.35V Low Voltage - 1024Meg x 72 - Server Memory Model (CT8G3ERSLD8160B)