LENOVO 03T8398 COMP 8GB DDR3-1600MHZ ECC SRX4 RDIMMAddOn 8GB DDR3 SDRAM Memory Module 8 GB (1 x 8GB) DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz Dual rank Memory CL11 1. 50 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: 03T8398 AM SKU: RSC279082 UPC: 821455637388 8 GB capacity is enough to execute all memory hungry programs simultaneously 1600 MHz of memory speed skillfully manages the variety of apps and computational tasks 240 pin pin DDR3 SDRAM interface synchronizes electrical and clock signals