Few days ago I got a 6800 XT to replace my GTX 1080, and it works fine with exception of windows sleep functionality. It appears to go to sleep fine, but then I wake it back up, the monitors will not turn back on, the keyboard I see turning on, but the Num Lock light turns off after a second (when its usually on), and when I try to click Num Lock again, that light flashes for a moment then turns off again.
When I force it to reboot, it looks like the computer will post fine but still none of the monitors will turn back on, and this continues with any following reset I tried. The only way I found for it to come back to normal is to disconnect the power from the PSU and reconnect it, then the monitors will turn on and everything else appears to be running fine. I saw some posts from 1-2 years ago with similar issue, and their solution was to disable the HDCP support but that did not make any difference for me. Sometimes if I manually put it to sleep and wake it right after it works fine, but most of the time it does not. I have yet to successfully wake it up after it goes to sleep automatically.
I never had an issue like that when I was using the GTX 1080.
