32.0GB (2 X 16GB) OWC 2666MHZ DDR4 PC4-21300 ECC 288-PIN RDIMMOTHER WORLD COMPUTING OWC 32GB (2 x 16GB) DDR4 SDRAM Memory Kit For Mac Pro, Rack Enclosure 32 GB DDR4 2666 PC4 21300 DDR4 SDRAM 2666 MHz CL19 1. 20 V ECC Registered 288 pin DIMM VPN: OWC2666R1M32 SKU: RSC511275 UPC: DIMM 32 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 2666 MHz of memory speed skillfully manages the variety of apps and computational tasks DDR4 SDRAM interface