CMS 12GB (3X4GB) DDR3 10600 1333MHZ ECC Registered DIMM Memory Ram Compatible with HP/Compaq Workstation Z600 C2 Seires Only Ddr3 Ecc Reg for Server Only - C20 at Amazon.com
CT3Kit51264BA160B Crucial Memory Desktop
G.SKILL 12GB (3 x 4 GB) Ripjaw Series DDR3 PC3-12800 1600MHz (9-9-9-24) Triple Channel Kit Desktop Memory Model F3-12800CL9T-12GBRL at Amazon.com
Patriot Gaming Series 12 GB (3 x 4 GB) 240-Pin DDR3 PC3-12800 1600 MHz 9-9-9-24 Triple Channel Kit PGS312G1600ELK at Amazon.com