JUST REALISED POSTED THIS IN THE WRONG PLACE, SORRY.

Hey everyone!
So recently I have been having problems which I believe is GPU related. When I launch some (not all) games my screen decides to pins and needles / crash. I will attach a video below of what is happening. The weird thing is it's only the monitor on which the games are launched to (BENQ xl2411). A few games of which I have experienced this problem are: CSGO, Just Cause 3, Team Fortress 2, ATS/ETS2 and Arma3.
My specs:

• CPU: Intel i7-7700k 4.2GHz (No overclock)
  
• GPU: ASUS R9 290 4GB
  
• Mobo: ASUS PRIME z270-A
  
• PSU: Corsair 750W (Can't remember which one exactly)
  
• RAM: 16GB Corsair Vengance DDR4 2133MHz (2x*GB)
  
• OS: Windows 10 Pro 64-bit
  

Also, I have made sure all my drivers are up to date.

Any light to shine on this would be really useful, thanks!