Features: NVME to PCIE1X, support PCIE 2X 4X 8X 16X (if connection to these three interfaces, please note that do not pluged the reverse, pluged the reverse must burn) Support pcie4.0 hard drive, limited by pcie1x rate, no matter your hard drive is pcie3.0 or pcie4.0, the conversion is only a few hundred megabytes of speed. Also 99% of pcie1x slots not bootable and cannot be used as a system drive. If you not sure if the hard drive works, you can take a picture and send to customer service to help confirm. Whether you can use the M2+ adapter as a system disc depends on whether your computer supports pcie booting or not, while not by adapter. If your motherboards supports pcie boot, then you can make a system disc by setting the first boot to pcie slot in the boot item. Older motherboards don't have this feature. Specifications: Name: NVME M.2 to PCIE 1X 16X Adapter Card Support PCIE3.0 PCIE4.0 Solid Disk Test Card Card Size:about 8x2cm/3.15x0.79in PCIE1X to NVME speed reference in PCIE slots is as follows (For NVMESSD supporting PCIE3.O): A running PCIE1.0 GEN1 state about: 200M-300M/S B: Running PC1-E2.0GEN2 state about: 400M-500M/S Running PCIE3.0GEN2 state about: 700M-800M/S This adapter is without chip, so not need driver, with for WIN7 installed the solid disk driver is installed with for WIN7, it is recommended to use for WIN10, please inform! Package Includes: 1PC NVME M.2 to PCIE 1X 16X Adapter Card note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.