1TB FireCuda 520 PCIe NVMe M.2 Int SSD Seagate FireCuda 520 SSD with PCIe Gen4 4 interface is our fastest solid state drive - nearly 45% faster sequential reads/writes than the previous generation. It provides plug-and-play compatibility with all PCIe 4.0 motherboards, and delivers an extreme boost in performance with the latest 3D TLC NAND technology. Upgrading to the FireCuda 520 unlocks Gen4 speed and supplies up to 9 faster sequential reads than SATA SSDs.