Samsung Original Laptop RAM. Capacity: 8GB. Type: DDR4 SO-DIMM. Speed: 2666MHz (PC4-2666V). Rank: 1Rx8. Part Number: M471A1K43DB1-CTD. Condition: 100% good and functional. I am selling the RAM separately because my laptop broke. There are no issues. Suitable for students, office, or personal use. Can be used in most DDR4 supported laptops.