CMS 4GB (2X2GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z200, Z210, Z400, Z600, Z800 for Server Only - B74

2PCS OF 2GB 1333MHz ECC Module NON REGISTER Lifetime Warranty. We don't use OEM or Generic parts to avoid incompatibility. Compatible with: HP Workstation Z200 HP Workstation Z210 HP Workstation Z400 HP Workstation Z600 HP Workstation Z800 Maximum Memory: 24 GB ECC-UDIMM with 2 CPUs 48 GB RDIMM with 2 CPUs Expansion: 3 Sockets (1 bank of 3) per CPU 6 Sockets total MODULES MAY BE INSTALLED ONE AT A TIME; however, for optimum performance install modules across all three memory channels for triple channel memory interleaving. If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). A 64-bit operating system is required to utilize more than 4GB of memory. DDR3-1333 modules automatically clock down to 1066MHz and 800MHz depending on which Intel Xeon model is used and the number of modules installed. Registered DIMMs on Z600 requires a systemboard with the C2 revision of the Intel 5520 chipset 4GB DDR3-1333 Reg ECC modules come in two versions: 313/4G using x4 and 3138/4G using x8 DRAM. The two parts may be installed in the same system but not within the same memory bank. Use like modules for dual and triple channel operation.