Improve start-up times with fewer delays during routine operations, run more programs simultaneously, and easily toggle between them with super-fast, power-efficient memory that you can scale to meet your exact requirements. Ensure that all of your memory characteristics match by upgrading with HP-branded memory that’s been tested for seamless system-level integration with HP PCs. Protect your investment with the same world-class HP limited warranty you get for your PC. ProDesk 400 G2 DM; ProOne 400 G2 AIO; EliteDesk 600 G2 DM; Eliteone 800 G2 AIO..