Samsung 4GB DDR3 PC3-12800 1600MHz 204-Pin SODIMM Laptop Memory Module RAM. Model M471B5273DH0-CK0 Go to amazon.com Related posts How to buy the best t440s fan? Top 9 recommendation ddr3l 1600 4gb 2022 FeatureCas CL11Voltage 1.54GB Single Stick. Dual rank if bought in pairs.204 pins Description4 GB DDR3 Laptop RAM SODIMM PC3-12800s Good Condition, Tested and Fully Functional,60 DAYS WARRANTY