4GB Memory HP EliteBook 840r G4 DDR4 RAM Upgrade 2666

Specs: 4VN05UT#ABA 4GB 260-Pin DDR4 So-dimm RAM Memory DDR4 SO* Made from the highest quality components, Arch Memory RAM modules are designed to increase productivity and help your computer work faster. Arch Memory products are engineered to meet industry standard specifications and rigorously tested to ensure quality. Backed by free technical support, a lifetime replacement warranty and legendary reliability, Arch Memory RAM is your best choice for upgrading your computer's memory 30 Day money back guarantee. Limited lifetime warranty.

eBay