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 'S Pm1735) Cannot Be Used. Pci Slots Are Not Supported. Inserting It Incorrectly Will Burn Out The Motherboard And Riser Card. If Your Motherboard Is Not A Ddr4 Or Ddr5 Memory Module, You Generally Need To Add The Nvme Startup Module To The Bios To Support The Nvme M.2 Hard Drive As A System Disk. Our Store Does Not Provide Technical Support For This Type Of Technology. Plug The Adapter Card Into The Pcie Interface Of Your Motherboard Correctly, Not Into The Pci Interface. Inserting The Adapter Card Incorrectly May Burn The Adapter Card And The Motherboard! Our Store Will Not Refund Or Exchange Any Cards With Burn Marks On Their Gold Fingers. This Must Be Caused By The Wrong Insertion! Functionally, This Adapter Card Is An Interface-To-Interface Conversion. There Is No Chip. It Does Not Pass Through Any Chips And Does Not Affect Any Performance Of The Hard Disk. It Will Be Shipped After Testing. Let Me Reiterate That This Adapter Card Does Not Support Sff-8639 Interface U.3 Single-Mode Ssd (Such As 'S Pm1735). In Terms Of Speed Test Data, Different Machines, Different Hard Disks, Different Configurations, And Different Test Data Are Also Different. Even If You Use The Software To Test Several Times On The Same Computer, The Data Will Be Different Every Time! Product Name: Sff-8639 U.2 U.3 To Pcie 3.0 4.0 X1 Adapter Card Function: The Product Adapter Card Is Inserted Into The Pcie X1 Slot On The Computer Motherboard. Function: Use The Sff8639 U2 Hard Drive On The Motherboard Slot Pcie X1 Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB Package Contents: 1 x Riser Card Module 1 x Full High-End Board 1 x Screwdriver 6 x Screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.