RAM & Memory Upgrades

OFFTEK 16GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 640 G3 (DDR4-19200) Laptop Memory OFFTEK 16GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 640 G3 (DDR4-19200) Laptop Memory OFFTEK 16GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 640 G3 (DDR4-19200) Laptop Memory