Please upload a picture of the issue to somewhere like Imgur and post a link to the results.
Do you have the ability to switch to a different interface and test? (DP, VGA, or DVI)
Are you saying that you tried two different computers and two different cables and experienced the same artifacting on this monitor?Yes, I can test in DP, however I've not tested yet because I found this issue in two systems (laptop and desktop) which suspected me that issue is not related to HDMI or DP. So just thought to share this problem in community before test in DP, I 've uploaded that image for your reference if you can identify the root cause.
View: View: https://imgur.com/zkYssHf