GPU Riser kits are the perfect solution for setting up Ethereum mining rigs or any other GPU-mined altcoin, whether small open air rigs or large rack based miners. USB 3.0 extender cables (60 cm) to connect your video cards to the main board thru PCI-E slots, you have total freedom while setting up your GPU cards. PCI Express 16x, 8x, 4x and 1x full compatibility on any PCIe slot on your motherboard. Adapter includes a buckle to secure your video cards. Standard 4pin molex power connectors for use with any standard or enhanced power supply. Gold plated contacts to ensure flawless connectivity and long lifespan.