The expansion card lets you take full advantage of the fast performance and compact size of PCIe U.2 internal solid- state drives. The adapter connects directly to your computer motherboard to support an NVMe U.2 PCIe- based SSD through ultra-fast x4 PCIe. With the U.2 PCIe- based drive in place, the adapter gives your computer a significant speed boost. Full height and low profile bracket included. Compatible with PCIe 3.0 motherboards and backward compatible with PCIe 2.0 and PCIe 1.0. The expansion card is equipped with a full-profile bracket and doesn’t require an adapter cable for installation, this helps to reduce clutter and simplifies system builds. The drive connects directly to the SFF-8639 connector on the adapter, and the adapter connects directly to the computer motherboard. Mount a 2.5" U.2 NVMe SSD or 2.5" SATA SSD into your desktop computer or server to improve your system performance and expand overall internal storage.