CMS 6GB (3X2GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z200 Z210 Z400 Z600 Z800 for Server Only - C80 at Amazon.com
G.SKILL 6GB (3 x 2GB) DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model F3-12800CL9T-6GBNQ - Newegg.com