Lenovo C20 19.5-Inch All-in-One Desktop (E1-7010, 4 GB RAM, 500 GB HDD, Windows 10) with DRAM Upgrade Lenovo C20 19.5-Inch All-in-One Desktop (E1-7010, 4 GB RAM, 500 GB HDD, Windows 10) F0B3005CUS Crucial 4GB Single DDR3 1600 MT/s (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V Notebook Memory Module CT51264BF160B