Tested and working. The Samsung 16GB 2Rx8 PC4-2666V DDR4-2666 PC4-21300 Laptop Memory M471A2K43DB1-CTD is a high-quality RAM module designed for laptops. With a total capacity of 16GB divided into one module, this DDR4 SDRAM memory features ECC for error correction. Manufactured by Samsung with a lifetime warranty, this SO-DIMM unit has 260 pins and a bus speed of PC4-25600 (DDR4-3200). Ideal for enhancing the performance and multitasking capabilities of your laptop, this memory module is a reliable choice for upgrading your system's memory capacity.