Check out the buying guide in videos section ADATA Premier 4GB DDR4 2666 unbuffered-DIMM memory is the latest upgrade solution that supports Intel's newest platforms for faster data transfer and enhanced power efficiency. ADATA Premier 4GB DDR4 2666 unbuffered-DIMM memory is the latest upgrade solution that supports Intel's newest platforms for faster data transfer and enhanced power efficiency. Every chip in ADATA memory modules meets strict JEDEC and RoHS standards, ensuring compatibility, stability. For Service Center please visit Adata Website> support>RMA service> Service center