HP 604506-S21 COMP 8GB DDR3-1333MHZ ECC 1.35V 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. 35 V ECC Registered 240 pin RDIMM Lifetime Warranty VPN: 604506 S21 AM SKU: RSC822630 UPC: 821455636787 8 GB capacity is enough to execute all memory hungry programs simultaneously 1333 MHz speed and Registered signal to execute routine softwares at a steady pace 240 pin pin DDR3 1333 PC3 10600 interface multiplexes 2 bit data