Axiom Memory Axiom 4GB DDR3-1600 SODIMM for HPAxiom Memory Axiom 4GB DDR3 1600 SODIMM for HP B4U39AA, B4U39AT, 689373 001 For Notebook, Desktop PC 4 GB DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz 204 pin SoDIMM Lifetime Warranty VPN: B4U39AA AX SKU: 872202NDS UPC: 845282071481 SoDIMM 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