Games never push your GPU to the same degree OCCT would, but you could still encounter instability issues from time to time. Loads are very different between games - while it would run fine in 9/10 games, the tenth game it starts to crash constantly. Answer from Jaba01 on reddit.com
OCBASE
ocbase.com
OCBASE/OCCT : Free, all-in-one stability, stress test, benchmark and monitoring tool for your PC
Ocbase is the home of OCCT, the most popular all-in-one stability / stress testing / benchmarking / monitoring tool available for PC
Reddit
reddit.com › r/overclocking › how reliable is occt for a stability test?
r/overclocking on Reddit: How reliable is OCCT for a stability test?
February 6, 2025 -
Hello, I have a few questions about OCCT as a stability test. How reliable are these tests? I was testing my GPU overclock using the 3D Adaptive "extreme" test, testing various overclocks. I set +200 on core clock and +1500 on memory clock in MSI Afterburner. Other benchmarks and games were always stable but as soon as I ran the OCCT test it showed me a lot of errors. So I decreased core clock to +150 and left memory clock at +2000 and let it run for another half hour. This time I had no errors. Does this mean that my first overclock despite being stable in games was indeed NOT stable? And does that mean that my second overclock now should be in fact stable as there were no errors?
Top answer 1 of 6
8
Games never push your GPU to the same degree OCCT would, but you could still encounter instability issues from time to time. Loads are very different between games - while it would run fine in 9/10 games, the tenth game it starts to crash constantly.
2 of 6
3
I’ve been overclocking my 5080. Using afterburner I passed OCCT, Furmark, 3DMark at +460 / + 2000. I played apex legends, cod and cyberpunk with no issue. I played Fortnite and that’s when the crashing started. I’m now down to 440/500 with 108 on power limit.
Whats the most realistic CPU stress test?
First, I think you're mistaking a stress test and a stability test. Occt is more of the latter, trying to detect errors that could be generated by your hardware. For that, there's no avoiding the "putting load on your components" part, that's true. You could avoid it in theory, but error detection would be so long it's basically pointless. You can remove from your mind that a computer that isn't stable under "unrealistic" load is stable under "less" load. If the stability issue is driven by power consumption or heat then yeah, it's true. It's false for everything else, from voltage issue to frequency issues and failing components. Most issues that arises when stability testing would arise under less load, it just would take more time for it to happen. OCCT small is a heavy test that doesn't go past the cpu cache. There's little applications to such programs out there, but it's basically the most effective way of testing your cpu for temperature and such. It's isn't unrealistic, it's designed to be extreme. OCCT large tests your whole cpu/chipset/memory components, and as such, is loading your components less individually. Yet, it is much better to find stability issues than small in practice for general purpose testing. Do not lessen a test to the power it draws or to the temperature the cpu reaches - a stability test will indeed reach higher temps than normal apps, but because a stability test reaches higher temps doesn't mean it is better. A good rule of thumb here is to use occt large with the highest avx instruction set your cpu/os supports. More on reddit.com
10
2
October 30, 2020Is stress testing safe?
Prime95 overnight testing is deemed by many to be the only way to test CPU's but when moving up ya OC's in steps, that can lead to a lot of long overnights and leaves a new machine owner waiting days... ... Some stress programs are absolutely not safe, especially Furmark and OCCT. More on forums.tomshardware.com
5
0
February 4, 2012Understanding OCCT
It's basically p95 small FFT, among the heaviest tests you can run. p95 small FFT, OCCT small dataset, linX, Y-Cruncher all tests are the Heavy Quartet of Stresstesting. This is my 5800X on quite tuned PBO and a custom loop. https://imgur.com/a/fKYJhMJ Edit: just ran r23 to check settings and thermals and scored 16460... If you only ever are going to game just check that you can compile shaders in TLOU1 and UE5 games More on reddit.com
25
5
May 9, 2024Test PSU for Failures Inside Windows?
There's utilities that will stress your PC, but there's nothing that will tell if it's the PSU. To see if your PSU is causing issues, you can use a multi-meter (or PSU tester), or try your existing PSU in another PC (or try another PSU in your PC). ... OCCT PSU test puts a maximal load on your PSU. More on forums.anandtech.com
8
0
October 2, 2019Ventoy
rtech.support › guides › how-to-use-occt
How to use OCCT | rTS Wiki
3 weeks ago - OCCT stands for Overclock Checking Tool. Its a stability testing suite as well as a excellent error checking tool that allows for stress testing (like that found in the HWInfo stress test guide) and as an added bonus, error checking within that stress test to ensure that the system/components ...
YouTube
youtube.com › watch
How to Use OCCT for Stress and Stability Testing | Test - RAM | CPU | GPU | Power Supply - YouTube
In this tutorial we will see how to install and use occt software for stability and stress testing of pc hardware components like ram, cpu, gpu , power suppl...
Published November 17, 2025
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 ...
SourceForge
sourceforge.net › projects › occt
OCCT download | SourceForge.net
OCCT
OCCT (OverClock Checking Tool) ... to test and monitor the stability of overclocked computer systems. It is widely used by PC enthusiasts and professionals to push hardware to its limits and ensure reliable performance under heavy loads. OCCT offers a range of stress tests for ... OCCT (OverClock Checking Tool) is a powerful diagnostic software designed to test and monitor the stability of overclocked computer systems. It is widely used by PC enthusiasts and professionals to push hardware to its limits and ensure reliable performance under heavy loads. OCCT offers a range of stress tests for C
SharkGaming
sharkgaming.zendesk.com › hc › en-gb › articles › 10983243538962-Test-Your-PC-with-OCCT-Simple-Guide
Test Your PC with OCCT (Simple Guide) – SharkGaming Systems
March 10, 2026 - OCCT is a free program that can test whether your CPU, GPU, RAM, and power supply are running stable. The program stresses your computer and shows temperatures, voltages, and errors in real time, making it easier to detect potential problems.
Make Tech Easier
maketecheasier.com › home › computing › windows › 6 reasons why occt is my go-to tool for stress testing cpus and gpus
6 Reasons Why OCCT Is My Go-To Tool for Stress Testing CPUs and GPUs - Make Tech Easier
November 27, 2024 - While simple to start, it still offers FFT-based stress testing and advanced functions like Prime95. You can configure load type, instruction set, threading behavior, stress intensity, and many other vital functions. I won’t say it’s more powerful than a tool like AIDA64, but it does a great job of balancing simplicity and customization. One of the biggest reasons I prefer OCCT is its all-in-one nature.
OC3D
overclock3d.net › home › news › why occt has changed gpu stress testing and why furmark’s no longer good enough
Why OCCT has changed GPU Stress Testing - OC3D
November 25, 2025 - We test a lot of hardware here, and one of our favourite stress testing tools is OCCT. We’ve used this tool for over a decade, and in recent years it has evolved to cover CPU, GPU, and (most recently) SSD stress testing.
YouTube
youtube.com › watch
How To Use OCCT | Stability Tester
To learn more, please visit the YouTube Help Center: https://www.youtube.com/help
YouTube
youtube.com › watch
How To Use OCCT In Extreme Mode - YouTube
In this video, we take a deep dive into OCCT (OverClock Checking Tool) and compare Normal Mode with Extreme Mode stress testing. Whether you're tuning your s...
Published July 1, 2025
MSI
forum-en.msi.com › home
OCCT - how log to run a full test
February 16, 2025 - Follow along with the video below to see how to install our site as a web app on your home screen · Note: This feature currently requires accessing the site using the built-in Safari browser
TechSpot
techspot.com › downloads › 4665-overclock-checking-tool.html
OverClock Checking Tool (OCCT) Download Free - 17.0.3 | TechSpot
1 hour ago - The name OCCT comes from OverClock Checking Tool. This application will let you benchmark and overclock your system components. OCCT is the most popular all-in-one stability check and stress test tool available.
Reddit
reddit.com › r/occt › whats the most realistic cpu stress test?
Whats the most realistic CPU stress test? : r/OCCT
October 30, 2020 - Do not lessen a test to the power it draws or to the temperature the cpu reaches - a stability test will indeed reach higher temps than normal apps, but because a stability test reaches higher temps doesn't mean it is better. A good rule of thumb here is to use occt large with the highest avx instruction set your cpu/os supports.
Tom's Hardware Forum
forums.tomshardware.com › home › systems
Is stress testing safe? | Tom's Hardware Forum
February 4, 2012 - OCCT is an amazing stress test program. It runs your hardware until it explodes them! I moved away from it the second time it blew my PSU and GPUs with a loud, fiery crack. I decided that two times in a row was not a freak accident. Do a google for XtremeSystems OCCT.
Reddit
reddit.com › r › OCCT
OCCT - Help, Feature requests, Bug reports,...
September 28, 2020 - After a lot of work and invaluable feedback from the community, we're excited to finally release OCCT V17 along with the new Memory Test! The Memory Test has been rebuilt from the ground up around a modular architecture. It now includes 16 individual testing blocks that can be combined to create highly customized memory stress tests, giving you more flexibility than ever for RAM validation, overclocking, and system stability testing.
Reddit
reddit.com › r/overclocking › understanding occt
r/overclocking on Reddit: Understanding OCCT
May 9, 2024 -
Can someone please explain why am I crashing on the CPU test with small dataset with all cores no matter the LLC and voltage?
Started to manually tune my r7 5700x, getting to 4.8GHz, no BSODs, games running, cinebench results (R23) satisfying at around 16500, so once I started decreasing voltage I'm now down to 1.3v drooping to 1.275-1.28v (LLC lv3) and it's passing everything except all core small dataset stress test.. Currently cycling cores with small dataset for 10 mins now, no errors so far. LLC LV2 with 1.325 set voltage gave 1.269 in cinebench but it crashed, 1.3 with llc 3 gives 1.275 and its not crashing.
So am I supposed to make it droop more? Or is it okay to just use small data set for single core and cycle them and use all core for medium/large dataset test?
Set parameters are small/extreme/variable/AVX2.
Motherboard I'm using is ASUS X470 prime pro, cooling the CPU with NH D15
I assume it shutdowns on account of thermals, since I can start the test with 8 threads fixed but once it reports close to 95° it just shuts down.
Is that a realistic workload, if thermals are the only problem and I KNOW I will never hammer the CPU with such a workload in real life, is it fine to ignore that test, or just to test up to a certain amount of cores?
Top answer 1 of 3
6
It's basically p95 small FFT, among the heaviest tests you can run. p95 small FFT, OCCT small dataset, linX, Y-Cruncher all tests are the Heavy Quartet of Stresstesting. This is my 5800X on quite tuned PBO and a custom loop. https://imgur.com/a/fKYJhMJ Edit: just ran r23 to check settings and thermals and scored 16460... If you only ever are going to game just check that you can compile shaders in TLOU1 and UE5 games
2 of 3
3
STOP doing static OC, learn PBO, and move on..
AnandTech
forums.anandtech.com › home › hardware and technology › power supplies
Question - Test PSU for Failures Inside Windows? | AnandTech Forums: Technology, Hardware, Software, and Deals
October 2, 2019 - There's utilities that will stress your PC, but there's nothing that will tell if it's the PSU. To see if your PSU is causing issues, you can use a multi-meter (or PSU tester), or try your existing PSU in another PC (or try another PSU in your PC). ... OCCT PSU test puts a maximal load on your PSU.
CPU Expert
cpux.net › cpu-stress-test-online
CPU Stress Test - An online tool to test your CPU stability | CPU Expert
CPU Stress Test is a CPU stability test that allows you to test online your processor at heavy load
CyberPowerPC UK
support.cyberpowersystem.co.uk › hc › en-gb › articles › 9739598367890-Stress-testing-and-troubleshooting-your-PC-with-OCCT-CyberPowerPC-UK
Stress testing and troubleshooting your PC with OCCT - CyberPowerPC UK – CyberPowerPC UK
OCCT is a program that is used to stress test and monitor the stability of a computer's components. It can help users determine if their computer components are running at their optimal performance levels and if they are stable, or if they are ...