HP 687458-001 COMP 4GB DDR3-1333MHZ ECC 1.35V SR RDIMMAddOn 4GB DDR3 SDRAM Memory Module 4 GB (1 x 4GB) DDR3 1333 PC3 10664 DDR3 SDRAM 1333 MHz Single rank Memory CL9 1. 35 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: 687458 001 AM SKU: RSC395816 UPC: 821455579718 4 GB memory allows you to have more programs open at a time 1333 MHz speed and Registered signal to execute routine softwares at a steady pace DDR3 1333 PC3 10664 operates at an effective bus speed with minimal power consumption and as