OWC 128GB (4X 32GB) 1333MHz 240-Pin DDR3 SDRAM DIMM (PC3-10600) Memory Upgrade Kit for 2013 Mac Pro OWC ECC Registered Memory Module 4 x 32.0GB PC3-10600 DDR3 ECC Registered 1333MHz 240 Pin 128.0GB OWC Memory Upgrade Kit Compatible with 2013 Mac Pro: Model ID: MacPro6,1 (2.7GHz 3.0GHz, 3.5GHz, 3.7GHz) OWC Memory Lifetime Limited Warranty including Advanced Replacement Program