Features: 100% brand new and high quality New design, 1X, 2X, 4X, 8X, 16X compatible (1-16X and 16-16X can be used), the circuit board PCIe adapter is newly released, safer, more efficient, and more practical. Gold plated PCI-E 1X slot for better connectivity and long life. No driver needed.With side clip to fasten other card. Dedicated for Bitcoin mining 15Pin interface to strengthen the power supply, reduce the burden on the motherboard. Soft usb3.0 cable is convenient to use that you can put it anywhere as you want. Package Includes: 1x PCIE-16X Main Card 1x USB3.0 Cable 1x PCI-E 1X Card Specifications: Product Name: Pci-e 1x To 16x Product Interface: Pci-e 1x Pci-e 16x Usb3.0 Riser Card Color: White Main Board Size: 122x44mm (approx.)/ 4.8x1.7in Pci 1 x Card Size:approx 3.1x 3.2cm/1.1x1.2in note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. This extension cable is suitable for motherboard PCI-E slot (1X 2X 4X 8X 16X). Please plug in the floppy drive power cord when using it. When plugging or unplugging the PCI-E extension cable, the computer must be disconnected and then plugged in. Be sure to read the precautions when using!