DELL A2257233 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: A2257233 AM SKU: RSC577879 UPC: 821455325025 8 GB bar will run multiple applications together and enhance your computer's performance 667 MHz speed to execute routine softwares at a steady pace 240 pin pin DDR2 SDRAM interface multiplexes 2 bit data from memory cell and I O buses