Product name:PCIe4.0 x16 to x16 extension cableProduct model:R33UF-TU-SI-4.0 (Silver color)Transfer speed: PCIe 4.0 x16full speed, 256G/bps (Max)Application: PCIe x16 graphics video card to PCIe x16 slot extension cable for ITX mainboard housingSuitable graphics card:RTX3090 RX6800xt, Supports all PCIe4.0 graphics cardsCompatible chassis: A4 ITX customized chassis, please contact the chassis seller, and purchase according to the model and cable length specified by the chassis seller.Usage restrictions: PCIe4.0 has high requirements on the equipment. As long as the extension cable is connected, the signal will be attenuated. This product does not guarantee PCIE4.0 full speed. If the equipment is aging, the signal is poor or the environment is not good, please use it at a lower speed.Usage restrictions: Only for ITX motherboards and their adapted mini-cases to install and use. Old graphics cards or motherboards older than four years are not supported.of wire length and hole distance: The PCB board of the 4.0 double-reverse version is relatively large. If you upgrade from 3.0 to 4.0, the cable length should be added about 0.2~0.5cm. For example, the original version of 3.0 has a cable length of 18.5cm, and the upgrade to 4.0 requires a cable length of 19cm.Cable length Description: The length of the wire refers to the part of the visible wire. It does not include the PCB and the connectors Length. colour: silverMaterial: high-speed flexible ribbon cableSize: cable length about 18.5cm/19.5cmPackage Contents:1 x PCIe 4.0 x16 Riser CableOnly the above package content, other products are not included.Note: Light shooting 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.