Samsung 4GB DDR4 2666MHz SO-DIMM Laptop RAM – part number M471A5244CB0-CTD. Pulled from a working machine after upgrade. Fully tested and works perfectly. PC4-2666V, non-ECC, unbuffered, 1Rx16 configuration, standard 260-pin SO-DIMM. Compatible with many laptops that support DDR4 2666MHz RAM. Please check your laptop's specs before purchase. What you see is exactly what you’ll receive — ships safely packaged, same or next day. No returns accepted. Compare prices — this is priced to move.