This SKHynix 8GB DDR4 SODIMM laptop memory RAM has been thoroughly tested and is guaranteed to work perfectly. It is a reliable and high-quality option for those looking to upgrade their computer's memory. With a capacity of 8GB per module and a bus speed of PC4-21300 (DDR4-2666), it is sure to provide a noticeable improvement in performance. The model number is HMA81GS6JJR8N-VK and it is brand new and never used.