IBM 00D4950 COMP 8GB DDR3-1600MHZ ECC DRX8 UDIMMAddOn 8 GB DDR3 SDRAM Memory Module For Server 8 GB (1 x 8GB) DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz Dual rank Memory CL11 1. 50 V ECC Unbuffered 240 pin UDIMM Lifetime Warranty VPN: 00D4950 AM SKU: RSC449650 UPC: 821455323854 UDIMM 8 GB capacity is enough to execute all memory hungry programs simultaneously 1600 MHz memory speed with CL11 latency for great multitasking capability 240 pin pin DDR3 1600 PC3 12800 operates at an effective bus speed