CMS 12GB (3x4GB) DDR3 10600 1333MHZ ECC NON REGISTERED DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z600 B3 SERIES DDR3 ECC For Server Only - B81 - Newegg.com
12GB OWC DDR3 1333MHz ECC Memory Upgrade Kit for Mac Pro 8-core and Quad-core Xeon systems (3x 4GB)