Crucial CT2KIT51272BA1067 8GB (2 x 4GB) - 1066MHz DDR3-1066/PC3-8500 - ECC - DDR3 SDRAM - 240-pin DIMM 1-Year Mfg Warranty Crucial CT2KIT51272BA1067 Crucial CT2KIT51272BA1067 8GB (2 x 4GB) - 1066MHz DDR3-1066/PC3-8500 - ECC - DDR3 SDRAM - 240-pin DIMM