Samsung 990 Pro 4TB M.2 NVMe Internal SSD PCIe Gen 4 - Up to 7450MB/s Read - Up to 6900MB/s Write - 1600K/1550K IOPS - 5 Years Warranty or 2400 TBW. . 990 PRO PCIe 4.0 NVMe M.2 SSD 4TB. - Samsung NVMe SSD powered by newly designed in-house controller. - Up to 7,450 / 6900 MB/s sequential read/write speed. - Power efficient SSD, reliable thermal control. . Blistering speed, endless victory. Experience long-lasting fast performance of PCIe® 4.0. The in-house controller's smart heat control delivers supreme power efficiency while maintaining speed and performance to help keep you on the top of your game[1].. . [1]PCIe 4.0's best theoretical sequential read is 8000 MB/s - 990 PRO reaches 7,450 MB/s as of Q3, 2022. . . PCIe 4.0 speed maximised. Huge speed boost.