*Update*: New PSU seems to have fixed my issues. PSUs are a mystery to me.
Thanks again.
My new PC (specs below) instantly shuts down if my GPU is under moderate to heavy load without any bluescreen or whatsoever. The event log shows kernel power 41 (63) critical event, which basically only tells you the PC was not properly shut down. Since there are no BSOD, there are also no dumps etc.
PC specs:
Mainboard: Asus ROG Maximus VIII Impact Z170 MiniITX (latest BIOS)
CPU: Intel i7 6700k (not OC so far)
RAM: Corsair Vengeance LPX 32GB (2x16GB) DDR4 2400MHz CL14
SSD: Samsung Evo 850 1TB
GPU: Asus Strix Geforce 970 (from old PC, latest driver)
PSU: be quiet! STRAIGHT POWER CM E9 480W (from old PC)
I can reproduce the shutdown by starting Furmark, which will instantly shut down the PC. I have also experienced shut downs after 15 minutes or so in Overwatch, but I had no issues so far in Rocket League. I also tried Witcher 3, where it gets interesting. If I run my RAM with the XMP profile (2400 MHz), the PC shuts off after a few minutes. If I disable XMP (2133 MHz), it shuts off a few seconds after getting ingame. Furmark shuts it down instantly, regardless of XMP setting. Temperatures don't seem to be an issue (max GPU: 75°C, CPU 100% load in Prime95: 75°C, gaming: 40°C).
Since it is such a generic error, there are tons of posts online about people with the same issue and lots of possible solutions. So far I have tried:
- RAM: memtest86+ for a few hours, no issues
- RAM: Tested both sticks separately in each slot, doesn't make a difference
- CPU: Prime95 for an hour, no issues
- CPU: removed 970 and ran Furmark on internal GPU, no issues
- GPU/PSU: Installed both back into my old PC and ran Furmark, no issues
- GPU: Tried older drivers, issue remained (old PC also had newest drivers)
- Other: Uninstalled Asus/Realtek audio drivers and software, issue remained (fixed it for some people apparently)
- Other: Plugged my PC into a different outlet in my appartment (some people suggested general power issues, I know the power grid in my appartment is old and sucks, had issues before)
A lot of people with this issue point to the PSU. But since it works fine in my old PC, which draws more power than the new one, I can't really imagine it being a problem. Could it be that my new mainboard is more sensitive to power issues resulting from the outlet/PSU and therefore shuts down while the old one (ASRock Z68 Pro3) didn't have any issues with that? Would it make sense to flash an older BIOS version? All power related settings are on default.
I'm pretty much out of ideas on what I could further try to fix this other than buying a new PSU to see if that fixes it, but I'm not confident it will, since the current one works fine in my old PC. Does anyone have any further suggestions on what I could try? Thanks.