LENOVO 0C19534 COMP 8GB DDR3-1600MHZ ECC DRX8 RDIMMAddOn 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 Registered 240 pin RDIMM Lifetime Warranty VPN: 0C19534 AM SKU: RSC442758 UPC: 821455287422 RDIMM 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 SDRAM interface multiplexes 2 bit data from memory cell and I O