The m aster chip of UT4G is ASMedia ASM2464PDX, Supports a variety of devices that comply with NVMe standards. Integrated USB4/for Thunderbolt Gen3x2 and PCIe Gen4x4 interfaces. Compliant with USB4 Specification Rev. 1.0 (including Interoperability with Thunderbolt 3TM (TBT3) Systems). Operating systems: Support for Windows10, Windows11, Linux and for Mac Os. Note: for Mac OS only supports for AMD series graphics cards. UT4G Support all PCIe graphics cards in the last three years, be sure to install the latest version of NVIDIA driver, if the yellow exclamation mark appears, please reinstall the driver and restart the computer. Friendly reminder: This product has many compatibility issues and requires assembly technology. Improper assembly or improper operation may burn your device. Only professionals can purchase it. Product name:USB4 to Pcie x16 eGPU Adapter with Bracket Product model:UT4G-BK8 UT4G-BK8: USB4/TB4/TB3 to PCIe x16 connector Inverted stand bracket Transfer speed: Gen3 x2 , 40G/bps (Max.) Application: eGPU for Notebook PC/Mini Host Interface: Compatible with TB3/TB4/USB4 interface, does not support USB interface. For the poor compatibility of handheld game consoles, please purchase with caution. Power instructions: Please prepare the power supply according to the power of the graphics card UT4G CLKREQ signal light is not on how to solve? This is because there is a problem with the hardware design of the graphics card. Some parts of the graphics card 5 years ago do not support the CLKREQ# signal. If the CLKREQ# signal light is not on, you can turn off the PCIe power saving function in the system or BIOS. Note:Due to different production batches, the printing silk screen/appearance is different, which does not affect the use. Colour:Black Material:PCB+Metal Package Contents: 1 * Docking station 1 * bracket 1 * for Thunderbolt 4 connection cable 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.