DennouCoil

So, i just got a Cosmos Elite, after setting up everything, i always got errors related to display port (DisplayPort connection is not stable or DisplayPort cable is disconnected or no video stream detected.) I have 1080 Ti with 3 DP. Tried every single of them. Tried re installing drivers by uninstalling them. Tried uninstalling every vive software and installing again. Nothing is working. Any idea why?