HP 593913-B21 COMP 8GB DDR3-1333MHZ ECC 1.5V DR RDIMMAddOn 8 GB DDR3 SDRAM Memory Module For Server 8 GB (1 x 8GB) DDR3 1333 PC3 10600 DDR3 SDRAM 1333 MHz Dual rank Memory CL9 1. 50 V ECC Registered 240 pin RDIMM Lifetime Warranty VPN: 593913 B21 AM SKU: RSC226518 UPC: 821455157381 RDIMM 8 GB capacity is enough to execute all memory hungry programs simultaneously Up to 1333 MHz memory speed with CL9 latency for remarkable multitasking capability 240 pin pin DDR3 SDRAM operates at an effective bus speed