Solved Horizontal line of dead pixels, kinda?

Hello, im not sure if this is the right place to ask and im sorry to bother anyone reading this but im totally confused



For starters, i am using a AOC 27G2UBK 27 inch 144hz monitor ; Radeon RX 580 series gpu and a displayport cable. I started having this isue maybe 10 months in since using the monitor, it all started with horizontally glitching pixels size of the taskbar aproximatly at the bottom of my screen, but that usually went away 10-15 mins after using my pc. Over next 1-2 months it started getting worse and sticking for a longer period till it got to the point it was pitch black (still the size of the taskbar), i tried troubleshooting with some advices on the internet, testing the dp cable, changing the port, cleaning the pc etc. but nothing helped until i switched the display setting to 120hz. 120hz worked just fine for a couple months and the same thing started happening again, then switching to 119hz helped and same thing over again. Now if i switch back to 144hz almost half of my screen is pitch black and if i drop the hz even more its fine again. I tried finding some help on the internet but i was unable to do so, any ideas on what the possible problem could be or do i have to go to the pc repair shop? im not very good with computers so if i missed some important spec or info i apologize but i will gladly add if asked.

Thanks for the reply,

i am using chieftec GPS-700A8 Smart Series. I have tried the problem display on another computer and it worked fine, i did not try another display on this one. I should note that the PSU is 4-5 years old by now.

phillpower2 said:

Apologies for the delay getting back to you, not been around for a couple of days I`m afraid.

So the screen itself is now ruled out as the cause which is at least progress.

Did you use your video cable when testing the screen on another computer, if you used the other persons you need to try another video cable between your screen and video port on the Radeon RX 580 series video card.

If you used your own video cable on the other computer the only test left is trying a known good screen on your PC, a notebook type computer that has the appropriate video port will do.



So bad that when independently tested it was rated as – Tier E • Avoid which is worse than only being able to support onboard video.



Released more than twelve years ago with only a two year warranty and no minimum efficiency rating, complete junk that should not be being used anywhere near an add on GPU, something which is confirmed at the link above.

Click to expand...

No worries, this service is free so i very much appreciate any help i can get!

I used other persons video cable so ill test with mine asap, if that doesnt work ill try different monitor as well. Thanks for the suggestion

I had no idea it was that bad, my pc is custom built with parts selected by a friend. I was planing on replacing it soon anyway so im also curious if there are any decent ones under 100e?

The weirdest thing to me about all of this is how the problem goes away when i lower hz, or if im playing games that are kinda hard to run. All the people ive talked to never heard of that happening so i was really confused