Monitors go to solid colors when playing games

[Androkistis]

Recently when playing games the monitors will randomly go to different solid colors. The audio goes a bit weird when it first happens but sometimes it will return. When It happens I have to reboot the computer.

I tried running benchmarks and they work fine. (3D Mark Time Spy and Superposition) GPU drivers are up to date. I also tried monitoring the temps but they seemed normal.

The computer is around 3 years old now and I have never had this problem before.
Not sure if it's related but when it started I was playing an HTC Vive game.

I have run virus checks and malware checks. I have tried uninstalling and reinstalling the GPU drivers. I also removed the Vive drivers. I have ran windows sfc.

Not sure what else to try, I don't have a spare computer to try parts in.

Any help would be greatly appreciated.

OS - Microsoft Windows 10 Home
CPU - Intel Core i7-6700K
MB - Asus Maximus VIII Hero
RAM - G Skill RipjawsV F4-3000C15-8GVR - 32GB
GPU - GIGABYTE GeForce GTX 980Ti 6GB WINDFORCE 3X OC EDITION
Monitor Acer H213H [21.5" LCD] (LF80D0028500) x2
Disk Drive Samsung SSD 960 EVO 500GB (500 GB, PCI-E 3.0 x4)
Disk Drive Samsung SSD 850 EVO 500GB (500 GB, SATA-III)
PSU - Corsair AX860i 860 Watt 80 PLUS PLATINUM

[Skiiwee29]

Usually when its doing that, the video card is starting to go out. Usually a memory issue. 

[Androkistis]

Is there any way to confirm this? I'd rather not have to buy a new GPU unless I need to.