Samsung - 990 EVO SSD 1TB Internal SSD PCIe Gen 4x4 | Gen 5x2 M.2 2280, Speeds Up to 5,000MB/s. Form Factor: M.2 2280. Fast speeds. Power efficiency. Its everything you want in a storage device. It's compatible with the latest PCIe 4.0 x4 and PCIe 5.0 x2 interfaces, and boasts improved performance compared to 970 EVO Plus.