Patriot Signature 12 GB (3 x 4 GB) PC3-10600 (1333MHz) DDR3 CL9 ECC Registered DIMM Memory Kit PS312G13ER3K-E 3 x 4 GB sticks of PC3-10600 (1333MHz) 240-Pin Dual in-line memory modules ECC Registered 2 Rank Double-sided modules with PCB height: 1181(mil) 100% Tested and must pass strict standards to ensure compatibility, quality and reliability. RoHS and JEDEC Compliant Built using specific build-of-materials (BOMs) ensuring every piece of server memory is of the highest quality Lifetime Warranty and Free Customer Support