Samsung ram memory 4GB (1 x 4GB) DDR3 PC3L-12800,1600MHz, 204 PIN SODIMM for laptops Module Size: 4GB ( 4GB x 1 ) Package: 204-pin SODIMM Feature: DDR3 PC3L-12800 Specs: DDR3 PC3L-12800 , CL=11 , Unbuffered , NON-ECC , DDR3-1600MHz , 1.35V Lifetime warranty.