Features: brand new and high quality This product only supports SSF-8643 to SFF-8639 cable, connected to U.2 SFF-8639 SSD This product supports the installation of 1 U.2 SFF-8639 hard disk in the PCIe NVMe for M.2 SSD interface of the machine, but the buyer needs to purchase additional SSF-8643 to SFF-8639 cable The hard drive signal line goes straight to the PCIe NVMe for M.2 SSD slot of your machine. The conversion does not need to go through the chip, and there is no restriction on the performance of the hard drive. Support 2242, 2260, and 2280 three-position installation (PCB board can be cut, please be sure to test it before cutting, once cut, it will no longer support refund and return service for any reason) Only supports connecting U.2 SFF-8639 SSD with SSF-8643 to SFF-8639 cable Package Includes: 1 PC x Adapter Card( without cable ) Specifications: Product Model: PCIE NVME to U.2 Adapter Card Interface Type: PCIE Applicable Models: Conventional Desktop Computers Expansion Interface: SFF-8643 Size: approx 8x2.2cm/3.15x0.87in note: 1.SSF-8643 to SFF-8639 cable is not included in the product 2. Make sure your motherboard has PCIe NVMe for M.2 SSD slot, Sata for M.2 NGFF SSD slot is not supported. 3.If you want to form for raid, please be sure to use 2 hard disks with the same specifications and the same model, so as to ensure the consistency of hard disk performance. Whether or not you can form a for raid is up to your motherboard. It has nothing to do with the adapter card. Our store cannot provide technical support. U.2 SFF-8639 SSD is not a SAS interface, please do not confuse