RX570 weird glitch?

[neocon]

I have a RX570 card, which I recently added to an oldish i5 3570k build.
https://www.overclockers.co.uk/asus...ddr5-pci-express-graphics-card-gx-415-as.html

I have noticed some strange graphical effects which don't look right. I haven't changed any default settings and I'm running at 1080p. Can you see from the s/s that there is a kind of snow.

Alien isolation

Doom

The snow is more visible at full resolution.
https://ibb.co/bWV4NHM

What's the issue here, am I seeing things or is my card defective?

 

[neocon]

That's interesting as I can't see it on my phone

Cable or monitor must be causing what I'm seeing to happen?!

 

[neocon]

I am using HDMI and I have tried swapping out the cable but the issue is still present.

I'll try a different monitor next.

I tried CS:GO and that looks fine, which is confusing.

 

[neocon]

It's doing exactly the same thing on a different monitor/cable.

Maybe it's some software issue ....