U.2 U.3 To PCIE 3.0 4.0 x1 Kit SFF-8639 Host Adapter For NCME PCIe Features: Function of this adapter card for interface to interface conversion No chip,does not go through any chip and does not affect any performance of the hard disk This adapter does not support SFF-8639 interface U.3 single mode SSD(such as Samsung PM1735) On the speed test data Different machines,different hard disks,different configurations,different test data That is,on the same computer with the software to test more than a few times Each time the data are not the same If your motherboard is not DDR4 or DDR5 memory sticks Generally you need to add NVMe boot module in BIOS to support NVMe M.2 hard disk as system disk We do not provide technical support for such technology Plug the adapter into your motherboard's PCIe connector correctly,not into the PCI connector Wrong insertion may burn the adapter and the motherboard Note: The product only supports SFF-8639 interface U.2 SSD or SFF-8639 interface U.2&U.3 dual mode SSD Not supported:SFF-8639 interface U.3 single mode SSD(such as Samsung PM1735)can not be used PCI slots are not supported,wrong insertion will burn the motherboard and adapter card Specification: Product adapter is inserted into the PCIE X1 slot on the computer motherboard to use Product size:117*81mm Total weight:73g Package includes: 1*Adapter card Note: Only include the above package products,Battery not included Specifications are manually tested and are for reference only Please allow 0-1cm error due to manual measurement Please make sure you don't mind before bidding Due to the difference between different monitors Pictures may not reflect the actual color of the item.Thank