HP 669324-B21 COMP 8GB DDR3-1600MHZ ECC DRX8 UDIMMAddOn 8 GB DDR3 SDRAM Memory Module For Server 8 GB (1 x 8GB) DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz Dual rank Memory CL11 1. 50 V ECC Unbuffered 240 pin UDIMM Lifetime Warranty VPN: 669324 B21 AM SKU: RSC395343 UPC: 821455156582 8 GB bar will run multiple applications together and enhance your computer's performance 1600 MHz memory speed for great multitasking capability 240 pin pin DDR3 1600 PC3 12800 interface synchronizes electrical and clock