OWC 16.0 GB (2X 8GB) PC8500 DDR3 ECC 1066 MHz 240 pin DIMM Memory Upgrade Kit for 2009 Mac Pro and Xserve

OWC Memory Upgrade Kit: 16.0GB Memory Matched Set (2x 8GB) PC-8500 1066MHz 240 pin DDR3 ECC SDRAM Modules For Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' systems and Early 2009 Xserve, Compatible with PC desktops with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B Compatible with Mac systems: Mac Pro 8-Core (Mid 2010 Model ID: MacPro5,1 2.4GHz), Mac Pro (Mid 2010 Quad-Core Model ID: MacPro5,1 2.8GHz, 3.2GHz, 3.33GHz), Mac Pro (Early 2009 8-Core Model ID: MacPro4,1 2.26GHz, 2.66GHz, 2.93GHz), Mac Pro (Early 2009 Quad-Core Model ID: MacPro4,1 2.66GHz, 2.93GHz, 3.33GHz), Xserve 8-Core (Early 2009 Model ID: Xserve3,1 2.26GHz, 2.66GHz, 2.93GHz), Xserve Quad-Core (Early 2009 Model ID: Xserve3,1 2.26GHz) High quality, 2 x 8.0GB PC8500 DDR3 ECC 1066MHz 240-pin SDRAM DIMM 1024M x 72, Dual Rank ECC Memory Module, 1.5V OWC Memory Lifetime Limited Warranty including Advanced Replacement Program"