CMS 48GB (6X8GB) DDR3 10600 1333MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z600 C2 Seires Only Ddr3 Ecc Reg for Server Only - C75 at Amazon.com
HP Z600 Desktop Workstation - ServerCart
Out of spec Z600 - HP Support Community - 7027523
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq Workstation Z600 (DDR3-10600 - ECC) Server Memory/Workstation Memory at Amazon.com
Z600 BIOS, Memory and CPU Upgrade - HP Support Community - 7039674