Oh, you reminded me of the my 4K AOC monitor. That was my biggest regret. Apparently I only took awful pics of it, but this POS never worked properly. Had to contact the consumer rights people in Taiwan to get a refund, as even after sending it back for AOC to do whatever they did to it, it never worked like a monitor should.
Basic problem: It would randomly switch off, which required me to pull out the power adapter for 10 seconds for it to work again.
Weird problem: Speakers would start to squeal at full volume for no reason.
Really annoying problem: The left side of the display would glitch and have this weird banding the full length of the display. Not a graphics card related issue, as I tested with two different cards.
AOC claimed there was nothing wrong with. Someone I know in Australia had exactly the same issues with his one too.
I will never buy AOC again after that mess.
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My cousin (who's 60) loves his and the games. Each to their own I guess.
I remember being over at a friends place many, many moons ago playing on the original PlayStation, I got blisters on my thumbs from the controller...