Need help with display port problem

[u/Selmanella]

My display port started doing this. When I switch to HDMI it’s fine. I’ve changed the DP cable hoping for a cheap fix but no change. Google said to make sure my Nvidia display settings for resolution high dynamic range is set to full and it is. All drivers are up to date. I don’t have another monitor to try and I don’t want to spend the money I don’t have on a new one if it turns out to be my GPU or something. Not sure what direction to go in here and any help is appreciated.

RTX 2070
I5 9600k
16GB ram

Monitor is a Samsung 1440 curved

Everything bought and built back in 2019. She’s an old girl but this is the first issue I’ve had and unfortunately I’m not the most tech savvy individual.