For TGX interface models, it is recommended to use OCuP4v2 For RTX40 series graphics card users, it is recommended to use OCuP4v2 Version update instructions: The changes in OCuP4v2 compared to OCuP4 are as follows: Add signal enhancement chip to comprehensively improve compatibility and support, and can support for /for AMD/for series graphics cards. Supports up to PCI-E4.0 x4 running at full speed. Add ESD/ to protect the graphics card and hardware when using For TGX interface hot plug. Add a signal control circuit, For TGX interface or other models OCuLink interface supports synchronous start and stop. A one-click start button is added. Some models that report errors when starting and stopping simultaneously can use one-click start to open the docking station and support synchronous shutdown. Due to different batches, the appearance, color and printed words of the product , which will not affect the use Material: Metal colour: black Package Contents: 1 x Kit 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.