Maybe I got the lemon.  I had issues with this working on 2 monitors: 3440x1440 and 1920x1080.  After going idle, the screens turned off (as desired), however, when I returned the 3440x1440 monitor resolution was completely wrong and also displaced horizontally and vertically.  I rebooted and it remained all messed up.  I normally ran 3 monitors (and up to 5) on my old pc and never had an issue.  No one should have to troubleshoot these things.  You might think it was a software issue, but I was running an updated fresh restore of Windows 10 Pro.  It's possible it was software, but in my experience this type of issue always come back.  So I returned it.  Not a good match for my setup I guess.It was a strong pc and never ran hot.  That was nice.