this post was submitted on 11 Jul 2026
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My PSU is failing? Unexpected instant crashes when playing games (lemmy.world)
submitted 17 hours ago* (last edited 14 hours ago) by garbage_world@lemmy.world to c/pcmasterrace@lemmy.world
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My specs:

  • RX 7800 XT
  • Ryzen 7500F
  • 32GB RAM (Memtested less than a month ago)
  • Seasonic X series 650W (high end PSU from around 10 years ago)

I'm currently running fedora rawhide linux, but I had the same issue on Bluefin Linux Stable and Debian Sid.

When I'm starting to play a demanding game, my system crashes within 5 seconds of loading the level. I wasn't able to reproduce that with stress tests. There's nothing in the logs, they just stop.

I think that's all. I can provide more details. If you can give me meaningful troubleshooting steps, I'm willing to install another system, even windows.

In my opinion the issue is clear, the PSU is old and can't keep up with the GPU, so I should probably replace it.

I don't want to do that, so if you have any other idea, please let me know.

What specs should I aim for for the new PSU?

Edit: I'm cooked, I tried booting the PC to make some tests again, but I'm getting a red motherboard light for CPU. The PC boots tho

Edit2: I found those deals on PSUs. I live in Poland, so prices are at least 25% higher than in the US:

  • Corsair RM850e 2025 for $110
  • FSP VITA GB 750W for $82
  • MSI MAG A750GL for $95
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[–] NarrativeBear@lemmy.world 1 points 13 hours ago* (last edited 13 hours ago) (1 children)

By any change is your GPU sagging even a little?

I had a pc go black screen and reboot on me a few times as the GPU was sagging just a little bit.

Getting a GPU support solved the issue instantly.

Test it out by getting something temporary to support your GPU or lay your pc flat and see if you have the same issue.

You can "temporarily" even use a toilet paper tube

1000063459

Or something more permanent

1000063455

Also there's a bunch of different other options out these, some more hidden then others.

1000063457

[–] garbage_world@lemmy.world 2 points 13 hours ago (1 children)

No, I have a GPU support since day 1

[–] NarrativeBear@lemmy.world 1 points 12 hours ago* (last edited 12 hours ago) (1 children)

Ohh well, thought it would have helped you out.

I guess you may have already tried all the usual troubleshooting as well. Such as pulling out all the PCI cards and trying to boot with just the motherboard a stick of ram, cpu, and hhd/ssd?

Other then that any psu should be fine, I generally go with modular corsair ones. Just make sure you get one that is compatible with your motherboard generation and has sufficient power rating. I generally go with 750 or higher for my builds.

[–] garbage_world@lemmy.world 2 points 11 hours ago

Thanks. I'm too leaning towards the corsair option.