Hello, I'm new to the community, I don't know if this is the place for this, so sorry in advance. I made my purchase for an RX6750XT like two weeks ago, ever since then I've been having some weird graphical problems with black bars apearing when I type and some black dots, sometimes white and pink, on youtube videos. This issue has been reserved only to browsers so far, I haven't encoutered anything on discord, steam or any games. For the black bars, I think it could have something to do with dark mode on certain websites because nothing happens on white mode, as for the videos on the youtube player, I have no idea. I don't know what could be causing it, I have the latest drivers and the GPU is brand new, I have also a second monitor having the same problem and have switched HDMI and DP around, and tried to write a form to AMD support, but the when I send it, it just loads infinitely. Is there a way to fix it? Sorry if pictures are hard to see, I had to take photos from my phone because screenshotting doesn't work.
The black lines can be chip deterioration, but can also be software problem... no one from the forum can give you definite answer with limited information without running tests. I suggest you submit a ticket with AMD support, so they can run some benchmarks and collect relevant information.