Samsung 990 Pro 4 TB M.2 PCI Express 4.0 NVMe V-NAND TLCBlistering 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. PCIe 4. 0 speed maximized Huge speed boost. Up to 40% and 55% faster random read write speeds than 980 PRO up to 1400K 1550K IOPS, while sequential read write speeds up to 7450 6900 MB s reach near max