Product name: OCuLink External Graphics Dock Transmission speed: PCIe 4.0 x4, effective bandwidth 64Gbps Cable length: Comes with OCuLink extension cable 50cm Product use: Used for external graphics cards or other PCIe devices Product description: OCuLink is an interface that is transferred through the NVME solid state drive slot of the computer motherboard. NVME uses a pure PCIe channel, so OCuLink's external graphics card dock also uses a PCIe channel, with low performance loss.Compared with the traditional thunderbolt transfer scheme, OCuLink's effective bandwidth in the case of PCIe 4.0 x4 can reach 64Gbps, which far exceeds the thunderbolt scheme. Friendly reminder: OCuLink does not support hot-swappable. Please turn on or off the graphics dock switch while the computer is turned off. Power supply description: Supports standard ATX power supply of 500W or above. Please prepare the power supply by the buyer themselves. Connector specifications: Support cable to board application Small size design: pitch 0.5mm connector Excellent SI performance: signal rates up to PCIe4 16GT/s and SAS 4.0 24Gbps Supports 85 ohm impedance applications Color: Black Material: Aluminium Package Contents: 1 * OCuLink SFF-8612 Female to PCIe x16 GPU Dock 1 * OCuLink extension 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.