The adapter for the interface to the interface conversion, without going through any chip, does not affect the performance of the hard disk. | This adapter only supports M.2 NGFF interface, which is the PCIe x4 transfer protocol SSD and PCIEx 2 transfer protocol SSD (make sure to understand the hard disk transfer protocol, buy the wrong is not used). | This product is inserted into the motherboard PCIE X4 or PCIE X8 or PCIE X16 slot, which is the motherboard's graphics card slot, do not mistake insertion PCI slot, the error may damage the motherboard, adapter and your SSD! | PCI-E NGFF interface SSD through the computer's PCI-EX4 or X8 or X16 interface transfer, Is it possible do the system boot disk depends on your computer motherboard, with the adapter does not matter. | PCIE X4 transfer protocol M.2 NGFF solid-state hard drive is divided AHCI protocol and NVME protocol two, Windows 7 can not recognize the NVME protocol solid-state hard drive, which requires special attention!