Oculink is an interface transferred from the NVME solid-state drive slot of the computer motherboard. NVME uses a pure PCIe channel, so the Oculink external graphics card dock also uses a PCIe channel with little performance loss. Compared with the traditional Thunderbolt transfer solution, Oculink's effective bandwidth can reach 64Gbps in the case of PCIe 4.0 x4, far exceeding the Thunderbolt solution. In addition to notebooks, this product also supports Intel NUC motherboard, STX motherboard, ITX motherboard, external graphics card, with M.2 NVMe interface can be used. Product name:Oculink External Video Card Dock Product model:F9G-BK7 Transferspeed:PCIe 4.0 x4, gen4, 64G/bps (Max.) Application: eGPU for NUC / ITX / STX / Notebook PC Friendly reminder: Oculink does not support hot swapping Product use: For external graphics cards or other PCIe devices Power supply description: Supports standard ATX 500W or above power supply, the buyer needs to prepare the power supply Note:due to different production batches, the printing of words is different, which does not affect the use. Color:Black Material:PCB+Metal Package Contents: 2 x PCIe 4.0 x4 GPU Dock