Crucial 16GB Kit (8GBx2) DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT2K102464BF186D Increases system performance Easy to install Premium quality memory from a trusted brand Laptop/Notebook dual voltage 1.35V/1.5V memory x4Gb based part uses newer technology