Intermittent Black Flicker On One of Two Monitors

[Boyo_TM]

Hi all!

 

I recently upgraded my rig to a Gigabyte 2070 Super (new, not refurb or reman) and i9-9700k. With that upgrade I purchased a new monitor, the 27GL850-B, 27" LG 1440p 144hz monitor connected via DisplayPort. I have a second 24" Dell monitor connected via DVI -> HDMI converter. The LG is intermittently and randomly flashing a black screen for a split second. The second monitor is fine. I tried an HDMI cable, yet it still flickers. Its not exclusive to any activity or app running as it flickers even when I'm not gaming or watching a video. Yet there's no pattern or consistency. Sometimes I'll go a full day with no issues, other times (like as I write this) it flickers five times every ten seconds. I'm inclined to believe it's not my GPU, as my second monitor would be flickering as well(?) yet I'm hesitant to return this monitor as I managed to get one with almost zero backlight bleed (IPS perks).

 

EDIT:
I take cooling very seriously. My CPU never exceeds 50° and my GPU never exceeds 55° even when playing on Ultra displaying in 2K.

 

What I've done/tried:

G-Sync disabled

Freesync disabled

Smart Energy Disabled

HDMI Cable

Updated GPU driver

System Specs:
Problematic Monitor - 27GL850-B (around 160 hours of display time)
Unproblematic Second Monitor - Dell S2316M (too many hours of display time)
i9-9700k

Gigabyte 2070 Super 8GB

MSI Z390-A Pro

Crucial Ballistix 2x16

EVGA 750W 80+ Gold
Samsung 860 Evo SSD

 

 

Help!!

My apologies for the video quality, I'm not sure why it's ruined.

Video.mov

[BecauseRussia]

Sounds like the monitor. I have the exact same monitor and have never had this issue.