Have you tried another port? also another cable, i doubt it come from the GPU VRAM, GPU VRAM dying hapenned to me once and i looked like this.

I think your problem is a faulty output port or cable, you seem to have tried another device and the monitor worked wich means the problem come from the cable or PC itself, it doesn't look like GPU VRAM, so i suggest you try another port, cable and if you can another monitor.

in hope to help.

 

I know this might not help, but the same thing happens to me on only one of the monitors(the right one, both are the same), and it seems it went away after driver reinstall but at the time turning it off and on would solve it. It sounds like generic answers i know..

 

Thank you all for your answers , gpu was replaced , everything works fine now

 

You can literally see this type of error in one of NorthwestRepairs videos.
https://www.youtube.com/@northwestrepair/videos
VGA error. He takes the GPU apart and fixes it. IIRC it was some kind of DRAM chip / VGA memory chip. IIRC, he is running EXTENSIVE ERROR SEARCH with electric measurement instruments. Thinks, maybe its one of the DRAM chips, finds some voltage error, takes out the malfunctioning chip and replaces the chip with a new one = re-solders it onto the disassembled GPUs printed circuit board, tests it, reports OK. Tests are running fine, image is clear in games and benchmarks. Reassembles the graphics card.
So if its a cheap GPU it may not be worth the repair. Buy another one?

 

Such aberrations I find are relevant to peanut butter and jelly, pepperoni, cat fur, etc. on connectors. Just kidding...... that's my keyboard's issues.
Seriously, now...... I sometimes suspect that the gauge of wire in multi-pin cables is unnecessarily thin. When the factories get to the point of shipping, they're facing shipping costs that rival the payroll. The primary reason a shirt that costed $0.37 to manufacture will cost $79 at point of sale. They surely design for the lowest possible weight of each unit they ship. Those hair-thin wires tolerate little movement. All it takes is one little break.
Next to consider is a cold solder joint. If you're adventurous, have a look at the display circuits. A cloudy bit of solder can turn out to be the singular problem. Solder at all points should be like perfect chrome. This was the case in many early Macintosh Plus computers...... the temporary solution was to bang on the side of the chassis as I recall...... in late 80's I was admin of 37 Macs and saw a few with this problem. I've found the culprit cloudy solder joints in a Marshall amp that failed intermittently, and also a BiAmp 16-channel mixing console and a USB-to-SCSI printer adapter.

Hope it helps.......