The SK Hynix 4GB DDR4 RAM PC4-2666V-U is a high-quality desktop memory module designed for optimal performance. With a total capacity of 4GB and a bus speed of PC4-21300 (DDR4-2666), this DIMM module offers fast and efficient data transfer. The compact design, measuring 30mm in height, and 288 pins make it compatible with a wide range of desktop computers. The SK Hynix brand ensures reliability and quality, making it a great choice for upgrading your computer's memory capacity.