I’d do Memory, CPU+RAM, Linpack, CPU. In sequence. Maybe Cinebench r23 and 2024 too. 1 hour is never actually enough, but if it’s new and not overclocked it’s probably fine. Use 3Dmark or just send some gaming for the GPU. Answer from TrymWS on reddit.com
OCBASE
ocbase.com
OCBASE/OCCT : Free, all-in-one stability, stress test, benchmark and monitoring tool for your PC
Test multiple GPUs, even of different brands, simultaneously without the need to connect them to screens, streamlining the testing process and maximizing efficiency. ... OCCT’s monitoring interface is clear and transparent, offering a straightforward view of critical system metrics.
Exxact Corporation
support.exxactcorp.com › hc › en-us › articles › 23617063201431-OCCT-Windows-Benchmark-System-Validation
OCCT Windows Benchmark & System Validation – Exxact Corporation
June 10, 2024 - At the first splash screen click "START" to start the program. It will launch the OCCT interface. From the left pane choose “STABILITY TEST, then choose “COMBINED”.
Videos
14:06
OCCT 12.1 - AI GPU stress testing, new 3D test, CPU Core cycling, ...
09:16
How To Use OCCT In Extreme Mode - YouTube
How To Use OCCT | Stability Tester
06:14
How to Use OCCT for Stress and Stability Testing | Test - RAM | ...
16:04
OCCT 6.2.2 Stress Test (Multiple PC Components Stability Tests) ...
05:39
How to stress test your computer/Gaming PC - YouTube
Is OCCT free?
The standard OCCT version is free to download and includes all the major features you require for personal purposes. You can perform stress tests, keep an eye on your system, and use various diagnostic tools at no charge. Although a paid version offers extra tools and expands testing time, most people will find that the free version is already well-equipped for their needs.
gizmodo.com
gizmodo.com › download › utilities › occt
Download OCCT for Windows and Linux | Gizmodo
Why should I download OCCT?
If, at any time, you’ve pushed your PC beyond regular use—whether building it or just by playing demanding games or heavy apps—you’ve likely asked yourself if your machine can handle the load. OCCT is designed to help you see your system’s limits before an actual problem appears. You might view it as a way to check your computer’s overall fitness. It’s not just telling you your battery functions well; it reveals your processor’s reactions to a heavy load. And, in many situations, this is the sole means of finding out about a problem with a part. · OCCT allows you to check the performance of ea
gizmodo.com
gizmodo.com › download › utilities › occt
Download OCCT for Windows and Linux | Gizmodo
What are the alternatives to OCCT?
As powerful as OCCT is, other applications can meet similar needs and could therefore be more suitable for you, depending on your requirements or comfort level. · HWinfo is quite widely used among similar tools. Unlike OCCT, HWinfo focuses on detailed system monitoring and shows an incredible amount of hardware data. HWinfo offers a live view of your system’s hardware, covering details from motherboard sensors through to your fan configurations. Though it lacks stress testing, it still follows your system’s performance and stores all results. Running OCCT alongside HWinfo greatly enhances man
gizmodo.com
gizmodo.com › download › utilities › occt
Download OCCT for Windows and Linux | Gizmodo
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 - Click on Combined in the tools list and you’ll find all the testing tools at the top. Select the ones you want to test at the same time and their settings will open below. After configuring each option, click on Start to stress test all selected components simultaneously. If your PC is unable to handle the simultaneous load, OCCT will give an error.
Reddit
reddit.com › r/occt › occt combined test (3d standard, 3d adaptive, vram) crashing pc
r/OCCT on Reddit: OCCT Combined Test (3D Standard, 3D Adaptive, VRAM) Crashing PC
September 30, 2024 - I had the same symptoms in my PC- random black screens and shutdowns, even when idle or light load (vlc, chrome). I have tried many things I found on the internet hoping to resolve this but the issue still persisted. Also tried several stress test programs, but only OCCT (Combined) was able to output VRAM errors.
Mundobytes
mundobytes.com › worldbytes › computer technology › hardware › how to perform stability testing with occt on cpu, gpu, ram, and psu
How to perform stability testing with OCCT: a complete guide
October 15, 2025 - Worldbytes » Computer Technology » Hardware » How to perform stability testing with OCCT on CPU, GPU, RAM, and PSU · OCCT combines CPU, GPU, VRAM, and PSU testing with real-time monitoring and graphics to accurately diagnose instability.
Reddit
reddit.com › r/occt › what test to run
r/OCCT on Reddit: what test to run
November 2, 2025 -
Hi what test should I run on a new pc/build that everything is fine and is the 1 hour enough?
Top answer 1 of 2
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I’d do Memory, CPU+RAM, Linpack, CPU. In sequence. Maybe Cinebench r23 and 2024 too. 1 hour is never actually enough, but if it’s new and not overclocked it’s probably fine. Use 3Dmark or just send some gaming for the GPU.
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If you want to test general stability, doing a combined test is probably best. But I like testing components one at a time before doing a full system stability test. I would stick to CPU+RAM for CPU testing, CPU alone is nice for overclocking and pushing thermals but CPU+RAM is a better overall stability test. Linpack is good to do as well because it's a different type of load which can weed out hidden instabilities. If you've enabled XMP or EXPO profiles on your RAM, you might want to do their memory stability test as well. Even though RAM kits may say they're rated for XMP speeds, some can still fail under load. Whether doing CPU or RAM, AVX2 workloads are typically the most extreme for stability testing and temperatures, but often more extreme than your system will see, especially if it's a gaming rig. In general, "Steady" Load Type is for maxing thermals, "Variable" is better for stability testing because often times stability issues come when voltage drops or spikes, instead of when there's a constant, extreme load. If you don't want to test each component one at a time, do a combined test with CPU, Linpack, and Memory. You don't need CPU+RAM if you've chosen "CPU" and "Memory" separately. I would separate GPU testing like TrymWS suggested. For thermals, FurMark is best. 3DMark, Gaming, and Superposition are good stability testers. As for time, technically you can never test for long enough. But if you can pass a combined OCCT test for 1 hour, you're probably in pretty good shape. Most "heat soak" happens within 15-20 minutes, and stability problems will often arise within minutes, although there's plenty of examples of people passing tests for hours, only to fail after 5-6 or longer. The "Power" test on OCCT is nice if you're not confident in your power supply, motherboard, or cables. It will try to draw as much power as it can from the CPU and GPU. I also really like AIDA64's stability test, that has often found errors with RAM overclocks and CPU errors that other programs have missed. TL;DR: A combined, 1 hour test on OCCT is normally enough unless you're doing extreme overclocking. Test GPU separately with 3DMark, gaming, or Superposition. Testing for an hour is probably fine unless you're overclocking. Stick to "Variable" loads on OCCT for stability, "Steady" for thermals.
Gizmodo
gizmodo.com › download › utilities › occt
Download OCCT for Windows and Linux | Gizmodo
May 14, 2026 - By stressing your system, OCCT observes each component and reports its performance instantly. Opening the software gives you a simple interface, but hidden beneath that simplicity is a great deal of activity. There are various stress tests in OCCT, each one either testing the CPU, checking the GPU stability, or verifying the RAM consistency.
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
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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.
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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.
Steam
store.steampowered.com › app › 3515100 › OCCT
OCCT on Steam
May 14, 2026 - Graphics Card (GPU) – Push your GPU to its limits with DirectX and CUDA-specific stress tests. Memory (RAM) – Detect potential errors by putting your RAM under heavy load. Power Supply (PSU) – Simulate extreme power consumption to assess PSU reliability · With OCCT’s Stability Certificates, you can validate your system’s stability like never before.
Tom's Hardware
tomshardware.com › pc components › cpus
OCCT With Four Options - How We Stress Test CPUs
August 16, 2020 - Download OCCT here. This option generates the highest load of the four available options, though it's still less taxing than Prime95 with AVX and Small FFTs. We can say, however, that it is more stressful on memory than Prime95’s. ... The overall load drops yet again, making this test suitable for laptops that shouldn’t be pushed to their thermal limits.
GitHub
github.com › occt-power-supply-test
OCCT Power Supply Test · GitHub
May 19, 2026 - OCCT combines CPU, GPU, VRAM, and OCCT power supply test modes with OCCT monitoring graphs and OCCT error reporting exports—popular when validating new PSUs - OCCT Power Supply Test
Pcgamingtools
pcgamingtools.com › occt-download
OCCT v15: Comprehensive PC Stability Testing Suite with CPU, GPU, Storage, & Coil Whine Detection – PC Gaming Tools
OCCT v15 (October 2025) is the premier PC stability testing suite combining CPU, GPU, RAM, storage, and PSU stress testing with real-time monitoring. Latest version introduces Storage Test (SSD/HDD validation under load) and Coil Whine Detection (makes GPUs “sing” to isolate electromagnetic ...
SharkGaming
sharkgaming.zendesk.com › hc › en-gb › articles › 10983243538962-Guide-to-using-the-OCCT-Test-Program
Test Your PC with OCCT (Simple Guide) – SharkGaming Systems
March 10, 2026 - The Power test stresses the CPU and GPU at the same time to test your power supply.
Ventoy
rtech.support › guides › how-to-use-occt
How to use OCCT | rTS Wiki
2 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 ...
OCBASE
ocbase.com › news › occt-v13-release
OCBASE/OCCT - <!-- -->OCCT v13 release: Here comes a new challenger!
OCCT v13 is introducing the new OCCT identity with a revamped logo and interface. But that's not it. Brace yourself for the new Combined test, allowing you to run any test at the same time, resulting in thousands of variations for finding if your settings are perfectly stable.
Reddit
reddit.com › r/occt › crashing to black screen when using combined test, but not other tests.
r/OCCT on Reddit: Crashing to black screen when using Combined test, but not other tests.
June 6, 2024 - Come talk about OCCT, bugs, overclocking, feature requests,... ... Sorry, this post was removed by Reddit’s filters. Share ... This is a likely sign of PSU failure no doubt. You can try to check your RAM with memtest86 but I doubt it. One thing you can try is to undervolt your GPU via MSI Afterburner using the curving tool with this Guide. https://github.com/LunarPSD/NvidiaOverclocking/blob/main/Nvidia Overclocking.md ... When I used combined: CPU + RAM, memory, 3D standard, GPU memory, I got "memory_management" BSOD in 7-18min most of the time, but each on their own was fine for 1h+ long sessions without any issues, iirc I tried the above without memory overnight with no issues..
Filehorse
filehorse.com › windows › system tuning
OCCT - Download for Windows - FileHorse
It enables you to fully test your computer's stability, using 4 different tests: CPU:OCCT and CPU:Linpack aimed at testing the CPU, GPU:3D for the GPU stability, and Power Supply, a combination of CPU:Linpack and GPU:3D to fully load your Power ...
Published 3 weeks ago
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
OCBASE
ocbase.com › benchmark › memory › 62958f037402ff793fafb752
OCBASE/OCCT Memory Benchmark - Combined
May 30, 2022 - OCBASE/OCCT Memory Benchmark - DDR4 - 2 channel(s) : 1199.76
Overclock.net
overclock.net › home › forums › benchmarks › benchmarking software and discussion
What are some stability tests to ensure that your newly built PC is running fine? | Overclock.net
March 1, 2021 - A few test suites try to function as system-wide combination tests and some are even pretty good at it. AIDA64's system stability tester is one of these, and is a good baseline for finding true power supply requirements. However, none of it's individual tests are particularly hard to pass, so I always follow up with a reduced thread count run of OCCT in combination with looped disc read benchmarks, looped 3DMark graphics tests, with some video streaming on a second display.