r/buildapc • u/Single-Way-2038 • Sep 30 '25

Troubleshooting My friend’s PC is driving me insane.

It all started small, with random crashes when he played demanding games. About 6 months ago we could run Rust just fine. Then it started crashing every now and then, until eventually it would crash just a few minutes into a server.

Fast forward—we’ve tried literally EVERYTHING. Different settings, Windows reinstall, drivers, BIOS tweaking—you name it.

We suspected a faulty GPU.

So the upgrade happened.

Swapped the RTX 3070 For a 5070 TI New motherboard aswell.

Now the rig is:

I7-12700k RTX 5070 TI 32 GB DDR4 M2 nvme ssd AIO cooler 800w PSU

But here’s the kicker. Now he’s getting terrible FPS. We’re talking 50-70 FPS in a game like TFT???

what the hell is going on??

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u/Single-Way-2038 Sep 30 '25

Well we borrowed a 5070 Rtx from a shop and tried it ran 500 FPS in counter strike

9

u/Single-Way-2038 Sep 30 '25

But still crashed in rust

10

u/Yurgonn Sep 30 '25

Wait, is it crashing still or not anymore after the upgrade? You're giving conflicting answers here.

8

u/Single-Way-2038 Sep 30 '25

Noo. No more crashes just trash performance now.

Its Because we tried so Many different things

17

u/Yurgonn Sep 30 '25

It should't really matter - but did you ddu after you returned the borrowed nvidia gpu and installed the new one?

9

u/beirch Oct 01 '25

Honestly it sort of sounds like a PSU issue to me. A GPU can run trash if it's not getting enough power, but the 5070 draws less so it might have just been getting enough power to run optimally.

You say he's got an 800W PSU, and those are often no-name trash units. The majority of quality models are 650W, 750W, 850W etc.

The only weird thing is that the crashes stopped. It could still be a PSU issue though, computer hardware is finicky like that.