[Help] Random system crash/restart (No BSOD, No overheating)

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anwe

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Sep 12, 2017
2
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510
PC crashes and restarts without a BSOD, usually while playing games.

Most crashes have occurred when playing games like Civ V or Rocket League, but never when playing simpler games like Crypt of the Necrodancer or Don’t Starve Together, if that’s any use.
The PC will crash without any notice and instantly reboot, sometimes failing to boot and crashing again right away, continuing to try and boot and crash, over and over.
There is no crash report generated each time it crashes, and the only event log for each crash is the usual:
Source: Kernel-Power
Event ID: 41
Task Category (63)
These crashes started happening in the middle of August a few weeks ago and there'd been no problems with the system before that.

This PC was built in September 2016, and all the parts were purchased at that point, so all parts are 1-year old.

Specs:
CPU: i5-6600 3.3GHz
GPU: GEFORCE GTX 1060 ARMOR 6G OC
RAM: Kingston HyperX Fury 2x4GB DDR4 2400MHz
PSU: EVGA SuperNova G2 550W
MOBO: MSI Z170A SLI PLUS ATX
HDD: Western Caviar Blue 1TB
SSD: Sandisk SSD PLUS 240GB
CASE: NZXT S340
OS: Windows 10

The temps for all parts are reasonable. Keeping track with Speccy and MSI Afterburner, and the temps sit at 20-35 degrees Celsius across all parts at the point where crashes are happening. At max, I’ve seen temps go up to 60, but not since the crashes have started happening.
Also, ‘Restart on crash‘ is disabled, but the PC still restarts after crashing anyway.

Things I’ve tried:
Reinstalled Windows 10, deleting all files.
Cleaned out PC to get rid of any dust, though there was very little.
Drivers and BIOS are fully updated, using MSI live update to find any possibly missed drivers.
Removed one stick of RAM, still crashed, tried swapping with other stick, still crashed. RAM doesn’t appear to be the issue, unless both sticks are causing issues.
Ran Windows Memory Diagnostic and found no issues.

I’ve seen similar questions answered, but the answers are sometimes that the PSU isn’t a very high quality, or the RAM is faulty, or some component is overheating, and I don’t think any of these feel like the problem here, though I could be mistaken.

From what I’ve read on other threads, it seems like the PSU could well be the issue, but with it being so new and 80+ Gold cert. I’m not sure if the PSU being the problem is still as likely.

Any help or comments would be appreciated, I'm not really sure what to try next. I don't have a spare PSU to swap with to see if the PSU is the problem, and I don't want to do anything with any components to test them if I don't know what I'm doing.
 
Solution
The problem lies within your PSU and i suggest you RMA it.

The error source: "Kernel-Power" means that system got shut down since PSU failed to deliver power to the system.
What the real reason is for your PSU failure under higher load, that can be found out only by the RMA people once they thoroughly test your PSU. But the two most common causes are:
1. System tries to draw more wattage / amperage than PSU can deliver.
2. PSU fails to keep stable enough voltage and it shuts itself off.

Though, there can be other, less known issues as well. One that i can think of is the PSU's own internal protections that kick in when they're not supposed to. Your PSU has: OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over...

Aeacus

Titan
Ambassador
Shutdowns during gaming are mostly caused by 2 issues:
1. CPU/GPU overheats and to prevent any damage, system shuts down.
2. PSU fails to deliver enough power to the GPU or fails to keep smooth enough voltage for PC's operation.

Since your temps are within reason, it's the PSU who is acting up.

While your PSU has enough wattage for your system and EVGA Supernova G2 is great quality PSU made by Super Flower, there are still some lemons, even among the best. My guess is that your PSU voltage regulation has sifted outside of the ATX PSU standard specs of 5% on all rails (10% on -12V and -5V rails) and your PSU can't sustain stable enough voltage for your 120W GPU to run under higher load. That's why your PC shuts down once you start gaming.

Only fix is to get a new PSU. Either RMA your EVGA unit and get a replacement or if you don't trust EVGA anymore, go with Seasonic unit in 500W range. E.g: S12II-520, M12II-520 EVO, G-550 or Focus+ 550,
pcpp: https://pcpartpicker.com/products/compare/bkp323,TgW9TW,fZyFf7,DPCwrH/

Focus+ is the newest PSU line from Seasonic and it comes with 10 years of OEM warranty. Other listed Seasonic PSUs come with 5 years of OEM warranty.
All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic. Full specs with pics in my sig.

Oh, all semi- and fully-modular Seasonic PSUs are also compatible with CableMod SE-series custom sleeved power cables. To match my Skylake's black & red theme and Haswell's black & blue theme, i have replaced the stock black power cables with CableMod SE-series custom sleeved power cables (red colored for Skylake and blue colored for Haswell).
cablemod: https://cablemod.com/products/?filter_series=se-series&show_products=48
 

anwe

Prominent
Sep 12, 2017
2
0
510
Hi, thanks for the response and insight.



I went into the Bios to check the voltages, here's what it said:
CPU Core: 1.072 or 1.080v
CPU I/O: 0.968v
CPU SA: 1.088v
System/5v: 5.040v
System/12v: 12.384v
DRAM: 1.216v

I may not fully understand, though it appears that none of these values lie outside of their respective 5% or 10% tolerances.
Is the voltage regulation still the issue here and should I still open an RMA, or does this mean that the problem could potentially lie elsewhere within the system?
 

Aeacus

Titan
Ambassador
The problem lies within your PSU and i suggest you RMA it.

The error source: "Kernel-Power" means that system got shut down since PSU failed to deliver power to the system.
What the real reason is for your PSU failure under higher load, that can be found out only by the RMA people once they thoroughly test your PSU. But the two most common causes are:
1. System tries to draw more wattage / amperage than PSU can deliver.
2. PSU fails to keep stable enough voltage and it shuts itself off.

Though, there can be other, less known issues as well. One that i can think of is the PSU's own internal protections that kick in when they're not supposed to. Your PSU has: OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection) and SCP (Short Circuit Protection).

But that much is clear that when you browse the web or do light gaming then your system works fine but once you start heavy gaming and PC puts higher load on PSU, the system shuts down. Well working PSU won't shut down once the load gets higher, only low quality PSUs do that or when there's something wrong with the PSU.
 
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