HP 731761-B21 COMP 8GB DDR3-1866MHZ ECC SRX4 RDIMMAddOn 8 GB DDR3 SDRAM Memory Module For Server 8 GB (1 x 8GB) DDR3 1866 PC3 14900 DDR3 SDRAM 1866 MHz Single rank Memory CL13 1. 50 V ECC Registered 240 pin RDIMM Lifetime Warranty VPN: 731761 B21 AM SKU: RSC824933 UPC: 821455229873 RDIMM 8 GB capacity is enough to execute all memory hungry programs simultaneously 1866 MHz of memory speed skillfully manages the variety of apps and computational tasks DDR3 1866 PC3 14900 interface multiplexes 2 bit