New monitor: what are these artifacts or distortion?

Question

I bought the Dell S2417DG which includes GSYNC, and I am getting some horrible artifacts (maybe more often with darker colors). It appears to occur in any resolution. My other Acer monitors on the same PC do not have this issue. The monitor is plugged into my RTX 2070 with a DisplayPort cable. Seems to happen anywhere: Netflix HBO Max, JPEGs, etc. Taken with a camera:

New Dell monitor
Normal older monitor

How can I fix this?
NVIDIA settings for the monitor:

More comparisons in high-res:

Look at the hair. New Dell monitor
Look at the hair. Normal older monitor

This is the same PC hooked up at the same time.
Things I have tried that did not help:

Trying a different cable
Trying a different port on the GPU
Resetting the monitor to factor settings

bobflemingesq · Answer

It looks to me like the 'artefacts' are present on both screens in the same place...just that the new monitor colour / brightness / contrast levels are emphasising it.  Have you tried something really high definition like a blu ray or 2k youtube video to see if it still shows?  Could be an overheating graphics card if it's completely random?
Perhaps check that all your cables are up to the latest spec?  HDMI cables are not all alike.  Maybe swap to display-port if available?

damian101 · Answer

To me it looks like your graphics card or your monitor applies some gamma correction to the display output, heavily brightening the dark parts in the process, which makes compression artifacts and color banding much more visible. Some monitors have a feature, often called "Black Equalizer", which does something similar.
I would reset your monitor settings first, if the issue is still there I would look in the Nvidia Control Panel for something that could cause this, and then also check the individual monitor settings.

New monitor: what are these artifacts or distortion?

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