CMS 12GB (3x4GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Compatible with HP/Compaq Workstation Z600 B3 Series DDR3 ECC for Server Only - B81 at Amazon.com
Kingston ValueRAM 16GB 1333MHz DDR3 PC3-10600 ECC Reg CL9 DIMM DR x4 1.35V Server Memory KVR13LR9D4/16 at Amazon.com
384GB DDR3-1333 (PC3-10600) ECC Registered Maximum Memory Kit at Amazon.com