Frequent screen flickers off than back on?

Basically once every minute or so my main (HDMI) monitor quickly shuts off, than right back on. I've tried doing research but haven't found much on this exact issue. Yes, Nvidia graphics drivers are installed/enabled, Yes, I have tried a brand new cable and No, this issue is not prominent on Windows, only seems to be mac High Sierra 10.13.3 is current version, but this issue was present even on Sierra.

Video Evidence - Gotta skip 10 seconds in, sorry: https://gfycat.com/HospitableLavishBobolink

My Build: https://pcpartpicker.com/list/Wrfp9J Main (Bottom monitor) connected via HDMI Secondary (Top Monitor) connected via DVI

If you would like any other info, please let me know!!

submitted by /u/adamcym
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