The 16GB OWC Memory Upgrade Module owc1333d3MPE16g is a high-quality DDR3 SDRAM memory module designed for computer upgrading. With a total capacity of 16GB and ECC memory features, this module offers reliable and efficient performance. Backed by a lifetime manufacturer warranty, customers can trust in the durability and support offered by OWC for their computing needs. This unit is untested and comes as is.