1. Effectively solve the lack of PCI-E interface on the motherboard. 1 interface can be expanded to 4 interfaces to connect to the graphics card, dedicated to mining, is your mining assistant. 2. Using plug-in board design, it can be directly connected to the motherboard interface without an extension cord, and can be fixed on the chassis, which greatly improves the stability and reliability! 3. The main control board uses the PCI-E interface for direct power supply, no need to borrow an external power cord, so that the main control board is not interfered by the outside world and has higher stability! 4. Reduce the number of adapters and patch cords. One line goes directly to the interface, effectively reducing the interference and line loss of the excuse, ensuring data reliability and improving work efficiency! 5. The USB connector adopts -plated design, which reduces interference between interfaces and enhances data integrity. used in 1U, 2U, 3U chassis. Product name: PCIE 4X expansion card Bus interface: PCI-E 4X (compatible with x4, x8, x16/graphic interface) Number of interfaces: PCIE to USB interface*4 PICE card size: 120x55x75mm System support: , LINUS, WINXP, WIN7, WIN10, etc. Colour:black Material:PCB+metal Package Contents: 1 x PCIE 4X expansion card Only the above package content, other products are not included. Note: Light 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.