system
A chat on subreddit /r/pcmasterrace
human
1. Graphics card may be dying 

2. Monitor may be dying

C. The hdmi/dp cable may be loose 

3. Something else
gpt
Yup pretty much all of those. to test if it's the monitor just hook it up to a tv or other monitor if you can.

 If it's still glitching, turn off your PC then check the PCIE connections to your Graphics card if they're plugged in all the way then turn on your computer and see if it still persists. 

If it's still glitching your gpu might be dying sadly.

Thankfully the prices are some what going down in the GPU market.