Capacity: 32GB (2 x 16GB) Type: DDR4 UDIMM (Desktop) Speed: 2666MHz (PC4-21300) Configuration: 2Rx8, Unbuffered, Non-ECC Part Number: M378A2K43DB1-CTD Manufacturer: Samsung Compatible with most Intel and AMD desktop motherboards supporting DDR4-2666. Pulled from a working office based system that saw occasional use in the business environment. — no issues. Sold as-is.