16.0GB OWC Memory Upgrade Kit 4 x 4.0GB PC10600 DDR3 ECC 1333MHz 240 Pin
Product Specs:
Size: 4GB (4096MB) 240-pin SDRAM DIMM 512M x 72, Dual Rank ECC Memory Module Data Rate = 1333MHz Module Bandwidth 10.6GB /s CAS 9-9-9-24 Voltage 1.5V Apple Specified Thermal Sensor* RoHS Certified