Features: 1.Reduce Burden: This USB riser powered adapter card possesses 4PIN, and two Graphic card 6PIN interface, which provides Graphic card independent power and reduces motherboard burden. 2.USB3.0 Cable: This USB riser powered adapter card adopts 60cm USB3.0 cable as extender cable, which ensures higher safety and efficiency. 3.Considerate Design: Slot is equipped with a fixed buckle to facilitate the demolition of graphics and fixed graphics card, so the card will not fall off from the slot. 4.Wide Compatibility: This USB riser powered adapter card is compatible with 1x, 4x, 8x, 16x PCI?E slot of the motherboard. Suitable for Win, for LINUX and for OS X systems. 5.Gold Plated: This USB riser powered adapter card adopts gold plated contacts for better connectivity and long service life, which is more wear resistant and increase the conductivity. specification:Item Type: PCIE Riser 1X to 16X Graphics Extension Material: Printed Circuit Board Usb Cable Length: 60cm Power Cable Length: 20cm Color: Red Conversion Board Interface: 4pin + 6pin Interface for Two Graphics Cards (Directing Differently) +USB3.0 1. No Driver is Required. This Adapter Kit is Compatible with 1x, 4x, 8x and 16x Pci-e Slots on the Mainboard. Suitable for Win, for LINUX and for OS X Systems. 2. Perfect for Installing Ethereum Mining Equipment. 3. the Slot is Equipped with a Fixed Buckle, Which is Convenient to Remove the Graphics Card and the Fixed Graphics Card, and the Graphics Card Will Not Fall off from the Slot. 4. the Power Cord is Made of Pure Copper Wire, Which Can Resist Oxidation and Rust and Avoid Wire Burning at Work. PackageList:1 x PCIERiser1Xto16XGraphicsExtension 1 x Power Line 1 x USB Connecting Line 1 x PCIE Interface Card