GPU/Monitor goes crazy when gaming at 144hz, but not at 60hz. MSI 390, BenQ xl2430t.

Let's start with specs: Win10 x64, currently using Pro Insider Preview build 14342 (issue existed on previous builds). CPU i5 4690k OC'ed to 4.4ghz (running at stock doesn't help), 16gb Ram DDR3, gpu MSI R9 390, current drivers 16.5.3 (issue exist with old drivers too), monitor is BenQ xl2430t.

The issue: I previously used this setup with a different 60hz monitor with no issue. I could even overclock the GPU and everything would go just fine. Earlier this year I bought the BenQ and starting playing at 144hz, at which point strange things started to happen. The screen would flicker to black, then come back, and then become fuzzy/blurry. It was as if the picture was slightly out of focus, or as if it was doubled and both versions were slightly out of sync with each others.

I saw that this seemed to be related to the overclock, the higher the overclock the faster this would happen. But even when running the card at stock, some very performance-intensive games would trigger this issue. Shutting down the game doesn't fix this issue, once it happens it remains until I either reboot OR I switch my monitor to 60hz and then bring it back to 144hz.

Running the 144hz monitor at a refresh rate of 60 doesn't trigger this issue at all. I could run any game, with a high overclock on the GPU, for as long as I want as long as its done at 60hz.

When searching around the internet, I saw people claim that other users had a similar issue, and this was fixed by increasing the core voltage. They told me it was an issue with the 2D memory on the card. I can easily believe this, as I can trigger the issue faster by overclocking the memory. Sadly, increasing the core voltage ALSO made the issue appear faster. Later, I saw that MSI Afterburner allows to modify the Aux Voltage, which seems to be the voltage to help increase stability on the memory of the GPU. I tried increasing it but I didn't see any significant change. I'm worried about increasing it too far, as I don't know how high is TOO high for Aux Voltage. I've seen users say they increased it by 50 to 100 to make their overclocks more stable. I've also seen someone say he fried his card by running it with +20. Me, I want my card at stock to be stable with no OC, I went as high as +38.

I tried gaming with my older card, this issue did not appear. Once more with MSI Afterburner I ticked every case related to voltage in the settings. I believe that having both Force Constant Voltage and increasing the Aux Voltage together helped a bit. I'm not actually sure its related to Aux Volt, and more the rest of the settings. It's now harder for the issues to appear.

At this point, my guess it that maybe there is an issue with the card and it should simply be RMA'd. But the fact that this issue ONLY appears in 60hz intrigues me greatly. Tweaking the voltage settings in MSI seems to have helped enough that I can game just fine at stock with very rare issues, but I'd be grateful if anyone else has some help to offer.