AddOn 8GB DDR3 SDRAM Memory Module - 8 GB (1 x 8GB) - DDR3-1066/PC3-8500 DDR3 SDRAM - 1066 MHz - 1.35 V - ECC - Registered - 240-pin - DIMM - Lifetime Warranty

IBM® 49Y1399 Compatible Factory Original 8GB DDR3-1066MHz Registered ECC Quad Rank x8 1.35V 240-pin RDIMM