IBM 00D5016 COMP 8GB DDR3-1600MHZ ECC DRX8 UDIMMAddOn 8 GB DDR3 SDRAM Memory Module 8 GB (1 x 8GB) DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz Dual rank Memory CL11 1. 35 V ECC Unbuffered 240 pin UDIMM Lifetime Warranty VPN: 00D5016 AM SKU: RSC189484 UPC: 821455323977 UDIMM 8 GB capacity is enough to execute all memory hungry programs simultaneously 1600 MHz memory speed with Unbuffered signal and CL11 latency for great multitasking capability DDR3 SDRAM interface synchronizes electrical and clock