Restarts linked to GPUs what to do next?

t99

Honorable
Jul 16, 2014
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I was having lots of weird random kernel power restarts. I replaced basically everything inside the computer except the motherboard and did so in an order to rule out each piece of hardware separately. I have a rx 480 and an older r9 270x. Swapped the 270x in, issues kept happening. Removed the gpu and running straight into the HDMI on the motherboard and it's been running some games fine for a couple of hours and appears to be fine. I think we can rule out the gpu being defective because it does the 100% exact same issue with each one. It doesn't seem to make sense that they would both randomly go bad at the exact same time. The 480 is about a year old, the other one 3 years, but has been stored away properly for a year and today was the first time I swapped it into a pc since then.

Does this mean the motherboard is bad and is there a way to test it? What exactly would be the issue on the motherboard? Faulty pci-e slot? It's hard to find any kind of pattern because it would restart sometimes after 10 hours of gaming (pretty much only after fresh install of windows) or sometimes 5 times in a row before it can even make it to the windows log in screen. The blue screens would vanish so fast you can't see what the msg is. I changed the settings that affect this, the ones that should allow the screen to stay there, but it doesn't. I could just be sitting on an empty desktop and it might restart, might be light browsing or super heavy usage if that helps at all.

Just to save some time, everything else has already been tested and it's not the power supply, ram or drives as I have swapped out all of these parts with the gpu installed and the same issue would always happen. It's not a heat issue either. The gpu gets removed, no more issue. Any ideas on how to test the motherboard or possibly fix this would be great. If I could boot into safe mode (or better configuration?) and run gpu benchmarks without issue would this tell us anything to help get to the bottom of things?


specs:
i5 4460
rx 480 / r9 270x
8gb ram ddr3 1600 PNY (brand new ram used for testing) old ram 4gbx2 ramaxel
Lenovo 10181 motherboard, bios version I1KT37AUS
psu corsair cx750m, insignia 550w

multiple of same part is the current one I was using and then the new one I bought to rule out the previous one being defective.

Not sure if this helps, but several months ago the same thing was happening and I did a fresh install of windows 10. It ran great up until a few weeks ago when this started happening again. There have been no changes and I don't even have much installed, just a few key games and some audio production software. I also disabled the core c6 states via registry and cpu is running consistently at 3.19GHz.