Features: For oculink external expansion devices, support connecting hosts with oculink port or converting M.2 port to oculink port via M2OC1B adapter cables. Supports small hosts, handheld game consoles, and laptops to expand external PCIE cards. Support external GPU graphics card, PCIE networking card, PCIE sound card, PCIE capture card, NVME\U.2\U.3 Solid disk. Bandwidth speed up to PCIE 4.0X4 64G. Support ATX\SFX\Small 1U power supply, the adapter board only needs to into the 24P power supply, the graphics card power supply is provided by the power supply. Power supply should be selected 500W and above. External GPU graphics card can support up to 4090, to 95% performances. Specifications: For Oculink External Expansion Card Bracket Length：about 50cm/19.7in 80cm/31.5in Bracket Color： White Bracket/Black Bracket/White Metal Box Component: Metal and Plastic Support PCIE 4.0X4 64G Package Includes: 1Set External Expansion Card note: 1. Please allow slightly error due to manual measurement. 2. Due to the differences between different monitors, the picture may not reflect the actual color