1TB Blue SN550 PCIe NAND M.2 Int SSD Put NVMe power at the heart of your PC for lightning-fast, ultra-responsive performance. The WD Blue SN550 NVMe SSD can deliver up to 4 times the speed of SATA SSDs. Whether you're working, creating, casually gaming, or processing large amounts of data, take advantage of this powerful internal drives high speeds to do more, faster.