This is DDR4 3200MHz 64GB Corsair Vengeance Ram (2 kits of 4 x 8 GB). It was used in a Threadripper 1950x system. It never had any issued whatsoever. The only reason I'm selling is that I upgraded to a 3960x system with 256GB of ram. It will ship in the original boxes (pictured) if you have any questions or concerns, please don't hesitate to ask. Thanks