4GB RAM Memory for HP EliteBook 8440p Notebook Black Diamond Memory Module DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.com
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq EliteBook 8440p (DDR3-10600) Laptop Memory at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq EliteBook 8440p (DDR3-10600) Laptop Memory at Amazon.com
A-Tech 4GB Memory for HP EliteBook 8440p Laptop (1 x 4GB) DDR3 / DDR3L PC3-12800 1600MHz Non-ECC SODIMM 204-Pin 2Rx8 1.35V Dual Rank Notebook Computer RAM Upgrade Stick RAM (ATMS266383B12034X1) at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq EliteBook 8440p (DDR3-10600) Laptop Memory at Amazon.com