4GB DDR3-1600 UDIMM FOR HP - B4U36AASAxiom Memory Axiom 4GB DDR3 1600 UDIMM for HP B4U36AAS For Workstation, Desktop PC 4 GB DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz 240 pin UDIMM Lifetime Warranty VPN: B4U36AAS AX SKU: RSC938401 UPC: 845282084627 4 GB memory allows you to have more programs open at a time 1600 MHz of memory speed allows you to browse web, listen to songs and use routine software simultaneously DDR3 SDRAM interface multiplexes 2 bit data from memory cell and I O buses to