8GB -2X4GB- Memory Ram Compatible with Dell Precision Workstation 670 Dual Rank for Server Only by CMS B47

8GB Total memory using 2pc of 4GB PC2-3200 DDR2-400 Dual-Rank Registered ECC DIMM. CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS. Compatible with Dell Precision Workstation 670 This chipset supports a maximum of 8 ranks. Per Dell, Dual Rank modules are only supported in the first two banks, sockets DIMM_1 through DIMM_4. Sockets DIMM_5 and DIMM_6 do not support Dual Rank modules. If Dual Rank modules are installed in sockets DIMM_3 and DIMM_4, sockets DIMM_5 and DIMM_6 are disabled. 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. If you install more than 4GB of memory, Dell requires an additional cooling fan.