Features: brand new and high quality PCIE riser card effectively solve the insufficient interface of the motherboard. One PCI-E riser interface can be expanded to 4 interfaces to connect to the graphics card. The PCIE raiser mining rig adopts a plug-in board design, which is directly connected to the motherboard interface without an extension cord, and can be fixed to the chassis, greatly improving the stability and reliability! The main control board adopts USB 3.0 PCIE card interface to directly supply power, no need to borrow an external power cord, so that the main control board power is not interfered by the outside world, and the stability is higher Reduce the number of PCI-E extension cable. One wire goes directly to the interface, effectively reducing excuse interference and wire loss, ensuring data reliability, and improving work efficiency. The power supply of the graphics card adopts solid capacitor and anti-burning machine setting, which makes the power supply of the graphics card more stable and safe. Specifications: Material:PCB Type: 785 and 474 Red/785 and 474 Black Hub: Approx 5.8x7.8cm/2.28x3.1 inches Adapter Plate:Approx. 12.2x4.5cm/4.8x1.77 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Expansion Cards