1. PCI-E X1 bus interface, suitable for pci-e 4x, 8x, 16x slots; expandable 7 USB PCI-E interfaces, effectively solving the problem of insufficient PCI-E interfaces on the motherboard.2. Adopting a plug-in design, it is directly connected to the motherboard interface without an extension cable, and it can be fixed to the chassis, greatly improving the stability and reliability3. The main control board adopts the PCI-E interface direct supply mode, no external cord is required, so the main control board is not interfered by the outside and has higher stability4. Reduce the number of adapters and adapter cables. One wire goes directly to the interface, effectively reducing interface interference and wire loss, ensuring data reliability, and improving work efficiency5. 7 Slots with strong scalability, the USB connector, which reduces interference between interfaces and enhances data integrityProduct name: PCIE 1 to 7 USB3.0 Riser Card for BTC Miner MiningBus port: PCI-E 1XUSB interface: USB3.0Number of ports: 7*USB3.0Main chip: ASM1187ESupported operating systems: DOS, Linux, Windows XP/7/8/10Colour:blackMaterial:PCB+metalSize: 120 x 117 x 58cmPackage Contents:1 x PCI-E to USB3.0 adapter cardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.