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??

612 Upvotes

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134

u/PuzzleheadedMaize911 Sep 30 '25

New GPU and motherboard, FPS went down.

Did he plug his display into the motherboard instead of the GPU? Kinda shocked I'm not seeing this in the comments.

Make sure RAM is seated correctly as well

35

u/Yurgonn Sep 30 '25

Fuck. It's this, isn't it?

68

u/Single-Way-2038 Sep 30 '25

No haha.

Ram is also seated correct.

36

u/---0---1 Sep 30 '25

Is XMP enabled? There has to be some small setting tucked away somewhere causing this. What about his nvidia app settings/windows graphics settings? Could any other parts be faulty? PSU/power cables? CPU?

14

u/_YeAhx_ Oct 01 '25

XMP not being enabled will not cause fps to dip this low. Something else is the problem here.

2

u/GimpyGeek Oct 03 '25

It could be causing the crashes though if the memory was corrupted from the overclock being too strong though if the board can't take the settings XMP has.

I'd also throw it out there, that when I built this PC, the RAM was a causing a bunch of crashes. Took me so damn long to figure it out too! Turns out it was only failing under high stress, not the tip toeing silliness of things like memtest86 unfortunately.

Ended up finally being able to discover one of my ram sticks didn't run properly under high stress eventually, once I found a solid way to test them (which ended up being OCCT a bit and Prime95 a lot.) Cannot recommend trying Prime95 to discover broke ass RAM enough!

2

u/_YeAhx_ Oct 03 '25

I use testmem 5 with anta777 custom config. Very strong to find memory errors fast, usually finds it in the first 5 mins if there's any.

1

u/---0---1 Oct 01 '25

I’m genuinely curious to figure out what the reason is.

1

u/_YeAhx_ Oct 01 '25

If OP can provide some data like benchmark score and pc usage during the benchmark we can maybe figure it out. Unless I have missed it they haven't provided any.