Product description: PCIE X16 full bandwidth 3.0, GEN3 protocol. Gold finger sinking process, increase gold thickness to 5U. with Slim sas 8i connector. with 1 in 4 clock split IC. with power on LED indicator. Low profile PCB design to minimize size. Support transferring 2 ports 4 ports to 4xnvme SSD. Support transferring 1 full band graphics card or 2pcsX8 bandwidth graphics card. Material: PC+metal colour: Black Package Contents: 1 x Expansion Card 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. 3. There is no that it is compatible with all motherboards, video cards, extension cables, systems. 2. This product belongs to a accessories, can not that all configurations can reach 4.0. Note: 1. Need your motherboard BIOS supports PCIE splitting working mode. Pls check it carefully before buying. Please confirm before purchase.