SMAKN Powered 16X to 1X PCIe Riser with Molex Connector - PCI Express Flexible Cable Card Extension Port Adapter - This Flexible Riser lifts a x16 GPU Video Graphics Card Controller Off the Motherboard for Better Cooling of your Videocard and the Motherboard keeps cooler - Use this Powered Riser to Build a Better Bitcoin (BTC), Litecoin (LTC) or Alternative Crypto-Currency Mining Computer Rig. Multiple High End Graphics Cards running at Full Throttle can destroy your motherboard if they are not properly powered via a direct 12V Line from the PSU via an attached Molex Power Connector. Also Great for a Server or High End Gaming PC