It only happens in Forza Horizon 3. I get what looks like a bunch of dead pixels on the right side of the screen all the way down. They change color rapidly. Once I exit that game, or even pause it the pixels go away.
 

Sajin
Does changing the graphic settings/resolution make the issue go away?

Nothing changes. I tried 3 different presets. The issue usually only comes up after about 5 minutes of playing

Sounds like either your overclocking the vram too far or your not using a higher fan speed profile and cooling the card enough. It may be that your trying to push settings through that are just too high also, or it could be a combo of all 3. Whats your ambients? Whats the card hitting in idle and in that 5 min mark of gaming?

Explaining an issue without pictures won't get you that far. I suggest at least taking a couple of photos to explain the issue.

Photos are best, but it sounds exactly like an issue I had specifically with Civilization VI. The very last horizontal line of pixels at the bottom of my monitor would change to funky colors, and only display the correct color if I "refreshed" them by dragging the mouse cursor across the bottom of the screen. Of course soon as I clicked next turn they would change to random rainbow colors again, as if the game forgot to redraw them. It was extremely distracting given it was often framed on a black background. I was told it is an a specific problem with the game and NVIDIA's drivers, but the game hasn't exhibited this issue recently for me so I assumed it was patched out. 
 
I'd suggest you make double-check the game is matching the exact monitor resolution, and then switch the game to fullscreen or borderless window mode depending on which it is currently set at. If that doesn't fix it you'll need to show an EVGA tech the photos and see what ideas they have. 

Any Custom INF Files from ASUS/Acer that can be loaded?

Hello,
 
Have you taken a screen shot when you see this occur? If the screen shot also shows the artifacting it will be GPU hardware related (in most cases) but if the pixelation does not show in the screen shot it is going to be the cable or display causing the issue.

The fact that it only happens in Forza Horizon 3 is very strange.
 
There has been no other time you've seen this issue besides in game on Forza?

VooDooPC
I found a work around though. The Forza Horizon 3 anti aliasing settings are OFF, 2x, 4x, and 8x. If the game is set to 2x or 4x, the graphical corruption appears. If the AA setting is OFF or 8x, there's no corruption. So for now I'm cranking it up to 8x.