Detected by the motherboard and windows. Changed risers, slots, nothing. 0 hashes. I connect the monitor to it and it outputs the display perfectly. All the other cards are hashing perfectly.
Check the cards on the rx rig it may plugged out little vibration or shake. I am using 5 RX 470 cards to mine the ethereum but they did not get the any issues as of now. One time i find that one card is not working but when i adjust the PCI cable connect on the motherboard by clean it connected back then it works perfect. So try loke that bro.