Features: For oculink external devices, support devices with oculink port to extend PCIE card. Supports the expansion of external PCIE cards for devices for oculink port, such as small computers, handheld game consoles, and notebook computers. Support external GPU graphics card, PCIE networking card, PCIE sound card, PCIE capture card, NVME\U.2\U.3 SSD, etc.; Maximum bandwidth speed for PCIE 4.0 X4 GEN4, 64G and backward compatible. Supports ATX\SFX\ small 1U power supply, power supply should be selected 500W and above.The external GPU graphics card can support up to 4090. Only support 2-slot graphics card, metal box limit graphics card length 24cm, limit thickness 44cm. Specifications: Size:about18.85x6.3cm/7.42x2.48in Component: Metal For Oculink External Graphics Card Holder Dock Support：PCIe 4.0X4 Gen4 64G Supports ATX\SFX\ Small 1U Power Supply Package Includes: 1Set Graphics Card Holder Dock note: Due to problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement.