DELL A2257181 COMP 8GB DDR2-667MHZ ECC 1.8V DR FBDIMMAddOn 8 GB DDR2 SDRAM Memory Module For Server 8 GB (2 x 4GB) DDR2 667 DDR2 SDRAM 667 MHz Dual rank Memory CL5 1. 80 V ECC Fully Buffered 240 pin DIMM Lifetime Warranty VPN: A2257181 AM SKU: RSC207221 UPC: 821455324967 DIMM 8 GB capacity is enough to execute all memory hungry programs simultaneously Up to 667 MHz memory speed with Fully Buffered signal for remarkable multitasking capability DDR2 667 interface synchronizes electrical and clock signals