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PC random black screen, doesn't come back (sh.itjust.works)

submitted 2 weeks ago by LazerDickMcCheese@sh.itjust.works to c/techsupport@lemmy.world

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I bought a Samsung Odyssey G9 and Nvidia 5070ti about a month ago. Monitor came first, works great. A week and a half later, I get the GPU. Case is 1mm too small for GPU, so I buy a new case (great start). Now my video (DisplayPort) and audio (USB to an interface) output drops, regardless of activity, then my fans ramp up. Then only solution I've found is a manual restart.

My PSU was almost a decade old anyway, so I bought a new one just to rule that out (again, great). Event Viewer and Reliability Monitor show kernel errors related to Nvidia drivers. So I switched from the standard driver to Studio to rule that out, same result. So I updated my mobo BIOS, same result. At that point I felt comfortable calling the GPU somewhat defective and returned it (had to pay for shipping, $171, again great). Replacement GPU arrived yesterday, and my outputs just dropped again and needed a manual restart. This time I'm not seeing any error codes however. I'm losing my mind, I really need help from a tech wizard.

Win11 Pro Gigabyte Z490 Pro AX Intel i9-10900F RAM 16GB (I think Vengeance) Nvidia 5070-ti Corsair RM1000X

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[–] Stremf@lemmy.world 1 points 2 weeks ago (1 children)

Do you have issues with other usb devices?

If two GPUs have had the issue would it not be a problem with the motherboard?

Have you tried a different cable to the monitor?

[–] LazerDickMcCheese@sh.itjust.works 1 points 2 weeks ago

No other USB issues

The motherboard is becoming my concern. Before I disassemble my computer again and buy yet another part, I'd like to make absolutely sure that this is the problem and not (for example) a simple setting change

Different cable as in HDMI? In that case no, and I don't have a different DP cable to try. I'm using the one that came with my display

[–] TheOSINTguy@sh.itjust.works 1 points 2 weeks ago (1 children)

Have you tried to reinstall windows? Or at least run a repair? Sometimes this can be a OS problem.

You can also use a wattage meter where you plug the computer in and measure it through the meter. You could see if there is a abnormally high power draw and begin to narrow things down.

Unplug everything that isn't necessary to see if it's a accessory issue.

One last thing you can do is grab a pen and paper, and setup a software CPU temp monitor and write down everything that happens when it goes black. Especially sounds the computer makes.

Also try and replicate it with another monitor.

[–] LazerDickMcCheese@sh.itjust.works 2 points 2 weeks ago

I've spent so much time testing RAM, using DISM, and scanning drive health...its nauseating. Considering the machine is good with the old GPU (which I want to rehousing in a different machine), I feel comfortable ruling out other peripherals (mouse, keyboard, audio interface). But correct me if I'm wrong here

I ran MSI Afterburner for a while too, forgot to mention that. Even under load, none of the components went over 30°. I stress tested the CPU and GPU for a long time just to see if it made the system more unstable, but it didn't seem to make a difference