I built a new mining rig, with 6x RX6800 GPUs, all connected with a riser to a MSI Z170A Gamin Pro mainboard and 2 PSU (HX1200 and RM1000x). However, one of the cards, the Powercolor Red Devil RX 6800 is not recognized by Windows 10. If I connect the card on another PC to the mainboard directly, everything works fine. Whenever I connect it with the riser, all the lights of the riser and card are on, but the fans don't even spin on startup. What I tried so far: - switched riser with one of the ones working with another card, and even bought another type of riser - switched cables (even connected two seperate PCIe cables to the card and a seperate PCIe to the riser) - disconnected all cards and tried with the Red Devil only - changed the BIOS PCIe settings from auto to 3, 2 and 1 So I ran out of ideas. Anybody has the same problem, with a solution?