OWC 32.0GB (4 x 8.0GB) PC3-14900 DDR3 ECC 1866MHz 240 Pin Memory Upgrade Kit For Mac Pro Late 2013 4x 8GB (32.0 GB) OWC Brand PC14900 DDR3 ECC 1866 MHz 240 pin DIMM Memory upgrade kit Late 2013 Mac Pro Memory Upgrade Module OWC Memory for Mac Pro 2013 fully meets Apple's specifications with special attention to proper thermal specifications Compatible with Mac Pro Late 2013 (December, 2013)Model ID:MacPro6,1 (2.7GHz 3.0GHz, 3.5GHz, 3.7GHz) OWC Memory Lifetime Limited Warranty including Advanced Replacement Program <span class="a-text-bold">Size:</span>8GB (8192MB) 240-pin SDRAM DIMM 1024M x 72, Dual Rank ECC Registered Memory Module Data Rate = 1866MHz Module Bandwidth 14.9GB/s CL13 Voltage 1.5V Apple Specified Thermal Sensor