PC Randomly Reboots

My system recently started to randomly reboot out of the nowhere while gaming(in some games). I can play games like Rocket League for 12 hours straight with no reboots. But more graphically demanding games like BO4 I can play sometimes 3 games than the system reboots or sometimes 6 hours before the reboot. I have tested 3 demanding games on 3 different clients to prove its not BO4. Also tested The Division(steam/uplay) and BF1(Origin). Same thing after 1-5 hours a reboot.
Im stumped because of how sparatic these reboots are.
ONLY EVENT IN VIEWER IS "Event 41 Kernel Power"
No BSOD, no errors, no black screens, no freezing, games fps aren't diminished.

All drivers are up to date
Windows is up to date
Only running Windows Defender
PC passes Aida64 Stress test for 9 hours(everything checked)
GPU passes Heaven Valley Benchmark for 9 hours
RAM passed windows Ram checker
Hard Disks passed tests.
Only have Mouse/keyboard/headset plugged into usbs
Unchecked Automatically Restart
No overclocks on cpu/gpu/ram
CPU temps max hit 55c
GPU max hits 57c (also checked vrm temps, only hit 67c)

PC spec
i7 8700k
Asrock Z370 Taichi
Cryorig A40 AIO
16gb Trident Z rgb ddr4
adata sx8200 250gb NVME ssd(boot drive)
WD Blue 1tb(games)
EVGA gtx 1080ti hybrid
EVGA Supernova 850w P2

Any help would be helpful. I am lost at this point. Thanks

Post was last edited on January 22, 2019 1:41 PM PST

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Clarification Request

I replaced the RAM and switched gpu's and the problem was still present. Next I changed the power supply and it hasnt rebooted since I changed it. Will close thread in a week or so. Gonna put some hours in and test some more

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driver files

Updates from windows can change your card's video driver files. Reinstall the original driver files for your video card.

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My video drivers are straight from nvidia. I update them when new ones are available. My pc has been running Aida64 with everything checked except gpu and Heaven Valley running full screen on extreme 1440p for the past hour and still going. No random reboots

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Keep an eye on the crosspost.

Post was last edited on January 22, 2019 3:34 PM PST

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Surge Protector

The pc is the only thing that it happens to. My router and modem don’t reset and monitor. All are plugged into the same surge protector

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Nope. Doesn't apply.

Each device can respond differently to a few lost AC "cycles."

There are plenty of priors on this issue but only new to this folk will think the power is OK because other things didn't drop out.

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Why wouldnt it happen other times the pc was under full load? I had aida64 stability test and heaven valley running together for 4 hours tonight and never one happened.

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You have priors to read over.

My longer post is missing so in short, we all wish the stress tests would show it. Read those priors about power, RAM, etc.

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PS. Forgot a thing.

Use DDU so you know you have no old drivers for the GPU.
Disable Microsoft's Driver Updater.

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Still Rebooting

I did a clean install of windows, changed surge protector, moved computer into other room for different power source, and the problem persists. I have ordered a new power supply and RAM for now. Will update when changed.

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Answer to PC Reeboting

Try changing power source,try changing RAM,try cleaning installation of windows.If still problem persists,better contact your supplier.They can guide you better.PS:any more help required from here,can ask it anytime,will be glad to help....Happy

Post was last edited on February 9, 2019 2:03 AM PST

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Will Update

I ordered a new psu and ram. Will update when i change them. I already did a clean install of windows to eliminate a software issue. Definitely a hardware issue. Just a matter of tracking it down

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