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Instant shutdown with OCCT PSU/GPU tests

forums.tomshardware.com › threads › instant-shutdown-with-occt-psu-gpu-tests.3633539

Hello, First of all, sorry for my english, I'll try my best. :) I don't OC my CPU or GPU. The latest change I made was the replacement 6 months ago of the GPU, a AMD 7850 that died for a RX 590 Nitro+. I play Wow Classic, Overwatch and Ori and the will of whisps. A few days ago, Ori started to freeze/crash after a few minutes of playing (so far more than 20 hours without any issue). Same thing occurs with Overwatch, game freezes/crashes (sound still works), back to desktop, sometimes I need to manually end the task. I played WoW for 2-3 hours yesterday without any problem. I guess WoW requires less resources from the GPU. I tried again Overwatch and crashed after a few minutes again. Memtest86 on my RAM => OK Then, I tried running other tests for hours with OCCT. CPU : OK Memtest : OK GPU / 3D : test with default value (complexity of 3) --> reboot within 10 seconds (Asus anti surge was triggered to protect system) I tried running shorter tests (5 minutes) with less complexity complexity 1 : OK complexity 2 : 1-2 errors I have noticed something else : the more complex the test is, the more I heard weird noise (like clicks) coming from the PSU. complexity 8 : instant shutdown/reboot PSU : instant shutdown/reboot (Asus anti surge again) Then I removed the GPU (RX 590) and run the tests with the onboard GPU : GPU / 3D : test canceled by user after 3 seconds ? PSU : test canceled by user after 3 seconds ? I tried with a pretty old GPU (ATI Sapphire X1950 GT from 2007) : GPU / 3D : no issue PSU : no issue I can't tell if the issue is coming from the GPU or the PSU, because the more load I put on the more reproducible the problem is. I tried removing and reinstalling AMD drivers --> no change. I have cleaned the dust from all the fans, removed and replaced the RAM sticks, GPU, connectors, etc... Here is my configuration, all parts are almost 10 years old and everything was working fine so far : PSU : Antec Neo Eco 520W MB : Asus M4A88T-V Evo USB 3.0 CPU : AMD Phenom 2 X6 1075T + Scythe Shuriken RAM : 12 Go DDR3 24 Kingston PC3-10700 and 22 GSkill PC3-10700 GPU : Sapphire RX 590 Nitro+ I am thinking the PSU is faulty but I can't be sure... Thanks in advance for any help. Graad Your PSU can output 480 watts on the +12volt rail if it's working properly. Your system, under heavy load with a 125 watt CPU and 250 watt GPU and the rest of the build will use around 400 watts, maybe more. You're pushing an old, budget power supply pretty hard under load. You really should be using a much better quality PSU around 650 watts with that RX590 NITRO. Answer from Archaic59 on forums.tomshardware.com

reddit.com › r/occt › pc immediately shuts down on power test

r/OCCT on Reddit: PC immediately shuts down on Power test

June 23, 2021 -

Hi all,

I've just downloaded OCCT today after trying to find the root cause to a PC crash/restart I've been having, and now OCCT causes my PC to immediately shutdown when running Power test.
I built the PC with all new components (expect from GPU which I have since replaced and still experience the issue).

PC Specs:

Case: Phanteks P400a
Motherboard: MSI Meg Unify X570
AIO: MSI MAG 360mm
RAM: Corsair Vengeance RGB Pro 32gb (2x16gb) DDR4 3600mhz (with 2 light enhancement kits)
CPU: AMD Ryzen 9 5900x
GPU: XFX Speedster MERC Radeon 6900XT (Black edition)
PSU: CORSAIR HX1000 Modular ATX PSU - 1000 W
GPU Support: UpHere (G276ARGB)
Storage:
Sabrent Rocket Plus 1tb NVME M.2
6TB HDD and my old SSD's (500gb + 250gb)

PC Crash/Restart:

My PC randomly restarts when playing COD Warzone. I don't play many other games but often working on the PC for 9-11 hours a day before playing games and never had any issues.

This has been happening since I built the PC in December, and has happened around 6-7 times now. It's really inconsistent as to when it happens and I've not been able to pinpoint it to an exact action/scene in-game.
There was a period since perhaps late March after I changed some settings (disabled power-saving mode & turned off automatic Windows updates), but has now come back and happened twice in the last week.

I received an event log for today's crash which was:
'Event 41, Kernal Power' - "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."

Following that information, I eventually found myself with a potential PSU issue which is where I discovered OCCT to perform some stability & stress tests, which is what's lead me here with my PC immediately shutting down when running a test.

The exact steps were as followed:

Downloaded & installed 'OCCT PERSONAL STABLE (x64) 8.2.1' from ocbase.com
Launched the application
Bit of navigation and research to figure out what I needed to run. No settings were changed.
Under the 'Test' page and 'Test Schedule' menu, selected 'Power'.
- Instruction set = Auto
Selected the large red button to run the tests
Presented with a popup related to the Pro version and directed to a web-page to be able to continue to execute the test
Hit the red button again to begin the test
PC turned off
Waited patiently incase I missed a prompt/warning notifying me that the PC would turn off, but after about 5 minutes nothing happened
Tried to turn on the PC to no avail
Turned the power switch on the PSU off & back on
Tried to turn on the PC to no avail
Repeated power switch step whilst also unplugging PSU cable and then replugging
PC turned on as expected

If any one has the answer to the PC Crash/Restart issue then I'd happily propose to you, but mainly looking for advise and support on the OCCT issue and why it turns my PC off completely and why I have to unplug & plug PSU cable back in for it to turn back on?

Thanks in advance <3

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This one's easy : a clean, instant shutdown on the power test is 99% of the time caused by a power supply that can't handle the load. Games don't load your components at 100% - sometimes it's waiting on the CPU, sometimes in the GPU, so things even out at a rough 50-70% usually ( depending on the game ). Sometimes you encounter conditions when the load will go higher - the scene to draw is simple, another process kicks in on your CPU, ... And this is when your PSU puts itself in safe mode as it detected that it couldn't handle the load. In short, you triggered a protection feature on your power supply because it can't handle the load. There're two ways of fixing this : change your power supply to a higher rated ( and known brand !) one. Another way of tackling this is to lower the power consumption of your computer : undervolting your GPU, undervolting your CPU, lowering their frequency in the process if not enough. It'll cost you some performance probably, bit at least you won't reboot. If you can afford it, I recommend changing your power supply, as it is, in my opinion, one of the most critical components of your computer. It's feeding every pricy component with power, and if it fails, there's a possibility it won't go down alone ( even if there're protections as you experience them here).

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This is a dead ringer for a power supply issue... I am pretty active on the EVGA forums and Corsair power supplies not being able to deliver the advertised wattage or just having general stability issues is a fairly common problem. The issue started to show up around the launch of the 2000 series GPUs from Nvidia and than with the 3000 series launch it kicked into overdrive. Ironically the issue seems to be more of a problem with there larger more expensive "high end" PSU than there cheaper units. I believe the issue to be caused by one of two things or a combination of the two... A lot of the "higher end" PSU from Corsair including the one that you listed use a multi rail system. Without getting too technical and diving into this too far... Basically your PSU can output 1000 watts total, but since it is a multi rail PSU, lets say two rails, each rail can only output 500 watts total. If you exceed this 500 watt limit on a given rail the PSU will shut down for safety reasons. In some cases I have seen in person that the Corsair PSU just cant output there advertised wattage. It is my belief that Corsair was taking advantage of there consumer by advertising there PSU as being able to output at one wattage when the actual output capability was far less. For the most part consumers were grossly over estimating the size of power supply they needed so Corsair was able to get away with this for a long time. However when the 2000 series and 3000 series GPUs launched an actual need for these 1000 watt power supplies developed thus exposing that Corsair PSU could not deliver. It appears from looking at the Corsair website that your PSU has a switch on the back of it that will allow you to disable the multi rail functionality. Yours may or may not have this... If that is the case I would disable it and see if that resolves the issue. As far as balancing the load across the two rails you will NOT be able to do this as Corsair does not provide the consumer with the information needed to be able to do it. Even if the above corrects the issue I would advise getting either an EVGA or Seasonic PSU at some point in the future. I do not recommend Corsair PSU to anyone at this point...

Overclock.net

overclock.net › home › forums › components › power supplies

Occt power test instant crash | Overclock.net

July 31, 2021 - When running occt psu test it will instantly crash and stop the test 4/5 times. Do I need a 1000w psu. I have 5900xt, 6900xt lots of fans and two pump watercooling system. ... More detail on the system?

Discussions

OCCT power test issues - PCPartPicker

Here is the weird part, I replaced it with an open box 1200w RM1200x shift from Corsair and it works fine on the same simultaneous cinebench r23 and furmark stress test but I wanted to check for the psu stability. So I ran OCCT power test and my pc started getting errors after a few second, ... More on pcpartpicker.com

pcpartpicker.com

Instant shutdown with OCCT PSU/GPU tests

change the power status of the ... the crashing sequence (and finishing the game btw). Since I wasn't sure which one of the two modifications seemed to fix the issue, I changed back the power status for the PCIExpress. I refinished the game : No issue at all. So, was it related to a Windows update ? Was it necessary to buy a new PSU ? Maybe, since I don't have the same tests that fail in OCCT, my PSU was ... More on forums.tomshardware.com

forums.tomshardware.com

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0

August 3, 2020

Power test displays... lots of errors (New to app, have no idea how to read anything)

https://discord.gg/zkXV2V3s best place to go for some help. Its the official discord for the app. More on reddit.com

r/OCCT

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4

April 18, 2025

Need help interpreting some test results: Power Test Crashes After a few minutes

Here, you're crashing in the most demanding test only, and with a sudden reboot, which indicates a power supply issue. I'm not sure the microstutters could be due to the same issue, but I'd fix it first personally. Your PSU being the culprit is much more likely than your house's electric system - to be sure, just test it in a neighbor or friend's house. More on reddit.com

r/OCCT

19

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December 4, 2022

Overclock.net

overclock.net › home › forums › components › power supplies

OCCT Power test crash | Overclock.net

August 30, 2025 - Intel 11600k RTX 4090 Seasonic PRIME TX-1600, 1600W I've been getting instant shutdowns while doing 3D content creation. I was able to replicate system shutdowns with the OCCT Power test. It would run for maybe 5-10 seconds on auto setting before my system would just shut down and reboot. temps...

PCPartPicker

pcpartpicker.com › forums › topic › 456389-occt-power-test-issues

OCCT power test issues - PCPartPicker

Here is the weird part, I replaced it with an open box 1200w RM1200x shift from Corsair and it works fine on the same simultaneous cinebench r23 and furmark stress test but I wanted to check for the psu stability. So I ran OCCT power test and my pc started getting errors after a few second, the test kept yelling ERROR ERROR ERROR, and the error counter was over 4 million (crazy right?) and then the pc rebooted just like before.

Tom's Hardware Forum

forums.tomshardware.com › home › components

[SOLVED] - Instant shutdown with OCCT PSU/GPU tests | Tom's Hardware Forum

Top answer

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Hello, First of all, sorry for my english, I'll try my best. :) I don't OC my CPU or GPU. The latest change I made was the replacement 6 months ago of the GPU, a AMD 7850 that died for a RX 590 Nitro+. I play Wow Classic, Overwatch and Ori and the will of whisps. A few days ago, Ori started to freeze/crash after a few minutes of playing (so far more than 20 hours without any issue). Same thing occurs with Overwatch, game freezes/crashes (sound still works), back to desktop, sometimes I need to manually end the task. I played WoW for 2-3 hours yesterday without any problem. I guess WoW requires less resources from the GPU. I tried again Overwatch and crashed after a few minutes again. Memtest86 on my RAM => OK Then, I tried running other tests for hours with OCCT. CPU : OK Memtest : OK GPU / 3D : test with default value (complexity of 3) --> reboot within 10 seconds (Asus anti surge was triggered to protect system) I tried running shorter tests (5 minutes) with less complexity complexity 1 : OK complexity 2 : 1-2 errors I have noticed something else : the more complex the test is, the more I heard weird noise (like clicks) coming from the PSU. complexity 8 : instant shutdown/reboot PSU : instant shutdown/reboot (Asus anti surge again) Then I removed the GPU (RX 590) and run the tests with the onboard GPU : GPU / 3D : test canceled by user after 3 seconds ? PSU : test canceled by user after 3 seconds ? I tried with a pretty old GPU (ATI Sapphire X1950 GT from 2007) : GPU / 3D : no issue PSU : no issue I can't tell if the issue is coming from the GPU or the PSU, because the more load I put on the more reproducible the problem is. I tried removing and reinstalling AMD drivers --> no change. I have cleaned the dust from all the fans, removed and replaced the RAM sticks, GPU, connectors, etc... Here is my configuration, all parts are almost 10 years old and everything was working fine so far : PSU : Antec Neo Eco 520W MB : Asus M4A88T-V Evo USB 3.0 CPU : AMD Phenom 2 X6 1075T + Scythe Shuriken RAM : 12 Go DDR3 24 Kingston PC3-10700 and 22 GSkill PC3-10700 GPU : Sapphire RX 590 Nitro+ I am thinking the PSU is faulty but I can't be sure... Thanks in advance for any help. Graad Your PSU can output 480 watts on the +12volt rail if it's working properly. Your system, under heavy load with a 125 watt CPU and 250 watt GPU and the rest of the build will use around 400 watts, maybe more. You're pushing an old, budget power supply pretty hard under load. You really should be using a much better quality PSU around 650 watts with that RX590 NITRO.

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Thanks a lot, I will buy a new one and it will be a good start to check the issue. Do you have good recommendations for the PSU ? I know Seasonic PSUs have good critics, but in case I am struggling to find one, what are there other models ? I can have a FSP HYDRO G 650 - 80+ Gold for 100 euros which is ranked 5 in the tier list according to this site https://10scopes.com/psu-tier-list/ Thanks The Hydro G is a solid unit. We have a tier list here at Tom's and the Hydro G is in the top tier A. https://forums.tomshardware.com/threads/psu-tier-list-psucultists.3624094/ There's also an in-depth review of that model right here at Tom's- https://www.tomshardware.com/reviews/fsp-hydro-g-650-power-supply,4462.html

Linus Tech Tips

linustechtips.com › the workbench › troubleshooting

Crashes During OCCT Power Tests - Troubleshooting - Linus Tech Tips

March 25, 2024 - Hello everyone, I'm encountering a particularly stubborn issue with my PC, leading to crashes under specific conditions, and after several diagnostic attempts, I'm seeking insights from this knowledgeable community. y system consistently crashes to a blue screen showing the Stop Code: CLOCK WATCH...

Ten Forums

tenforums.com › bsod-crashes-debugging › 207893-any-bsod-experts-have-7-attached-here-just-month-7.html

Any BSOD experts? Have 7 attached here just from this month - Page 7 - Windows 10 Forums

October 29, 2023 - Tried a new power cable of his and it crashed also, so I didn't even try to bring more of my setup: the issue is, luckly, localized entirely within the case. To-do priority for the weekend [editted]: OCCT > currently running multiple 1 hour tests on normal mode Wait for instructions for more SafeMode tests.

reddit.com › r/occt › power test displays... lots of errors (new to app, have no idea how to read anything)

r/OCCT on Reddit: Power test displays... lots of errors (New to app, have no idea how to read anything)

April 18, 2025 -

Hi, done a general 1hr power test a couple of times and it threw this both times. No idea what I'm doing.

Top answer

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https://discord.gg/zkXV2V3s best place to go for some help. Its the official discord for the app.

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I’m getting the exact same amount of errors, 785808 at a time… I’m very curious as to what this is. The only issue I’m having with my PC is a system crash at full load, but if I limit power consumption to 85% in MSI afterburner I don’t crash at all, even after hours of full load.

Find elsewhere

Google Bing Mojeek

reddit.com › r/occt › need help interpreting some test results: power test crashes after a few minutes

r/OCCT on Reddit: Need help interpreting some test results: Power Test Crashes After a few minutes

December 4, 2022 -

TL;DR

Problem: (1) Frametime spikes frequent every few seconds, looks like microstutters in game. (2) Freezing and Non-BSOD crashes/resets at random times.

OCCT Results: All tests passed except power test, which leads to a non-BSOD crash in a couple of minutes and kernel power error 41 in windows events viewer.

Specs: At end of post

Need: Help :(

Hi all, I've built a new PC and I've been trying to figure out for the past few days what's causing some issues. I've attached the specs to the end of the post.

Issue 1: Frequent extreme frametime spikes (a 400ms spike followed by some 40-50ms spikes seems to be the most common), which manifests in micro-stuttering every few seconds in games. The game, say Cyberpunk 2077 or Hitman 1 (there's no way a game this old should cause stuttering right?), would start off fine, but after 30seconds to a minute of playing, this would start.

Issue 2: Frequent non-BSOD crashes that come to a pc restart, this would happen seemingly randomly, during both gaming and light web browsing.

I was down in the dumps for days, but in my darkest hour, my wonderful girlfriend found OCCT, and I've been using this to do some test.

The CPU test was first, and it instantly spiked to 95c and stayed around there. I was at first alarmed by this, but I think this is normal (?) The small dataset test passed through 10 minutes without other issues.

The 3D-Standard test, memory test, and VRAM test also finished through 10 minutes without any problems.

The power test would not pass. My pc would crash and restart after a few minutes on the power test, every time. I even tried everything with the integrated graphics and it still failed. Events Viewer shows a EventLog 6008 followed by a kernel power 41 critical error at the same time of the crash.

How would you interpret this issue? Does this mean the PSU has been the culprit of all of these issues? Might it be the power system in my house? (The house i'm in right now is very old.) Could the open-box gpu be defective?

PC Specs

CPU: 7700X

COOLER: Noctua NH-D15

MOBO: ASUS TUF X670E Plus Wifi

RAM: G.Skill DDR5 6000

GPU: Gigabyte Gaming OC 3080Ti (open box from newegg)

STORAGE: WD_Black SN850X

PSU: Super Flower Platinum SE 1000W

CASE: BeQuiet 500DX

Other things to note:

In MSI Afterburner, the frametime spikes also coincide with voltage limit, power limit, and no load limit; not perfectly at the same time, but they seem sporadic when the frametimes are also spiking. Not sure if this means anything.
I tried playing things with integrated graphics. No frametime spikes, but that could just mean the PSU isn't demanding as much power, right?

Top answer

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Here, you're crashing in the most demanding test only, and with a sudden reboot, which indicates a power supply issue. I'm not sure the microstutters could be due to the same issue, but I'd fix it first personally. Your PSU being the culprit is much more likely than your house's electric system - to be sure, just test it in a neighbor or friend's house.

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sry for notifying on pretty old thread I am facing similar problem and i think psu is the culprit what is your update?

Tech Support Guy

techguy.org › home › forums › software & hardware › hardware

OCCT power crash each time | Tech Support Guy

I took PC after GPU crash to nearest pc shop and guy inserted 2 of his GPU and both failed to boot(he thinks that my PCLE is faulty and cant get enough power),then i took it to service and they said my gpu is faulty and that they tried with gt 710 and it works fine ,but gt 710 is 19 W card so?? anyway my motherboard is GA Z77 D3H ultradurable and have served me well cant see any damage on those japanese capacitors, i tried OOCT power test with integrated graphics and with that broken GPU 7850 2gb that works with microsoft basic adapter only ,and in both cases i get power crash after sec or 2,whatever test it it.(but it doesnt restart my machine ,it goes red sign and after red sing writen line power crash 01.

reddit.com › r/overclocking › instant crash with occt power test

r/overclocking on Reddit: Instant crash with OCCT power test

February 13, 2021 -

Hey i overclocked my i9 9900k @5GHz at 1.33v It’s stable on aida64 with 2 hours test On OCCT with 1 hour test with avx and 1 hour without avx Cinebench r20 stable too after 3 runs But everytime i want to run the power test in occt it freeze and bluescreen instantly. I tried with two PSU (750w and 1000w) and same issue. If anyone can help me it would be cool ;)

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Your OC isn't stable. Try add more voltage.

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It seems that the OCCT power test loads the cpu similar to prime95 smallfft avx. If your OC crashes instantly on p95 v30.3 smallfft, you will also crash on that occt test. The small set avx2 occt is also similar to both of these tests.

tl;dr: occt power test = p95 smallfft avx = occt small set avx2

reddit.com › r › OCCT › comments › 1shxb0z › occt_crashing_during_power_stress_test

OCCT crashing during power stress test

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OCBASE

ocbase.com › occt

OCBASE/OCCT : Free, all-in-one stability, stress test, benchmark and monitoring tool for your PC

We advise running this test first, as if it fails due to a PSU issue, it will do so very fast. And more often than not, the power supply is at stake in numerous problems. This test is an oddity in the OCCT lineup. It has two modes : the first one will do nothing.

Eight Forums

eightforums.com › windows 8 forums › general support

System Crashes When Running OCCT | Windows 8 Help Forums

March 12, 2014 - None of the others did that, so my impression is that OCCT is not too stable by itself. Intermittent crashes without BSOD are most difficult to troubleshoot but most common cause revolves around power supply, not only PSU itself but voltage regulation on the MB too. Actually, there's so many things that can cause freezing and lockups that just slow, painful and methodical testing can give a hint of what's going on.

Super User

superuser.com › questions › 1786814 › how-to-determine-if-gpu-or-psu-is-causing-shut-downs

power supply - How to determine if GPU or PSU is causing shut downs? - Super User

June 1, 2023 - Is there a way to tell (besides switching out the parts) which is causing the shutdowns? OCCT GPU and Power tests cause shut down - temps are fine though. CPU test does not cause crash.

Steam

store.steampowered.com › app › 3515100 › OCCT

OCCT on Steam

May 14, 2026 - OCCT is the gamer's favorite app for stress testing their PC or Steam deck components and check for errors ! Find out if your latest crash is due to a hardware malfunction or yet another game bug, and see all monitoring and system information in an easy-to-use interface.

Tom's Hardware Forum

forums.tomshardware.com › home › systems

Question - New build turns off randomly upon opening programs or games - OCCT PSU test shuts down PC | Tom's Hardware Forum

December 11, 2023 - After doing some reading it seemed that the PSU was the culprit, so i downloaded OCCT to test the PSU. As soon as i press "Start" on the PSU test, it restarts my computer. Due to this, i swapped the 850 watt Corsair PSU for a CM 1050 watt PSU but the problem persists. I have tried 2 different PSU's, both brand new, and with the same result. All components are running very cool. Overview of all the errors and criticals i get Details on one of the errors i get Another error im suddenly recieveing Details on the Kernel Power 41 error i get every time the PC restarts OCCT interface with component temps on idle OCCT interface while in-game

BleepingComputer

bleepingcomputer.com › bleepingcomputer forums › microsoft windows support › windows crashes and blue screen of death (bsod) help and support

Recently built PC crashing - Windows Crashes and Blue Screen of Death (BSOD) Help and Support

March 9, 2026 - All run fine after a test of 30 minutes, except power. Power test will shutdown and restart the PC at 1 to 2 minutes, sometimes it will not crash at all. But it is the only test that has crashed my PC fairly consistently.

Intel Community

community.intel.com › t5 › Processors › i9-14900k-randomly-crashing › m-p › 1572516

Re:i9 14900k randomly crashing - Intel Community

February 28, 2024 - Upgraded to a 1500W power supply to ensure sufficient power delivery, eliminating inadequate power as a cause. System temperatures and thermal performance have been monitored and are within normal ranges, discounting overheating as a contributing factor. Notably, the system crashes during two specific CPU-intensive tests: V-Ray Benchmark tool (when trying to test the CPU) and OCCT (OverClock Checking Tool), when inside the CPU test i chose the option for the "large" Data Set, suggesting a potential underlying issue with the CPU or its interaction with the memory controller, the motherboard or other system components.

reddit.com › r/occt › crash in power test

r/OCCT on Reddit: Crash in Power Test

July 15, 2023 -

My pc crashed 10-15 seconds into the power test with critical proccess died error. The pc sometimes randomly turns off while the fans and lights are still working. I want to assume it is a psu issue but the problems may have started right after I tried to run my RAM in 3200 MHz with XMP(it is supped to be 3200 MHz, but it never booted as the system was not stable. It ran in safe mode and I turned it back to 2400.) I had another issue one time that the PC simply didnt turn on, even though every cable was properly connected. It just went away when I turned the switch on and off multiple times.

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i am facing similar issue. Any solution?