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
🌐
Tom's Hardware Forum
forums.tomshardware.com › home › systems
Is stress testing safe? | Tom's Hardware Forum
February 4, 2012 - 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.
🌐
Steam Community
steamcommunity.com › discussions › forum › 11 › 4361249719400921855
Is it safe to use OCCT ? :: Hardware and Operating Systems
April 29, 2024 - No, you need 1200 Watts, otherwise you basically have no breathing room on the PSU @ full loads. For a UPS backup you need at least 1500VA which is approx 900-1000 Watts. You don't need a UPS that can handle the 1200 Watt PSU at 100% load, since ...
🌐
Reddit
reddit.com › r/occt › is it safe to use occt ?
r/OCCT on Reddit: Is it safe to use OCCT ?
April 29, 2024 -

Not saying it is not just asking.

My system is Intel i9 14900k and RTX 4090 plus a good amount of fans and a AIO.

Reason I ask is because last time I did a Power test, I think it is called, that testing power supply and mobo it used like 900 to 950 VA watts. I had a 1200 watt power supply but had to replace it. Replaced it with a 1000 watt power supply. Worried if the test uses 900 to 950 VA watts again it will damage my new power supply. Do I have a reason to be worried ?

🌐
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?

🌐
OCBASE
ocbase.com
OCBASE/OCCT : Free, all-in-one stability, stress test, benchmark and monitoring tool for your PC
OCCT’s monitoring interface is clear and transparent, offering a straightforward view of critical system metrics. With seamless integration of the renowned Hwinfo engine, OCCT ensures accurate and detailed monitoring of your hardware components. With real-time temperature monitoring and intelligent alerts, OCCT helps you maintain optimal performance while safeguarding ...
🌐
Softpedia
softpedia.com › news › reviews › windows software reviews
OCCT Review: Puts Your System Stability to the Test - Softpedia
OCCT
Benchmark your computer's CPU as well as push it to its limits by overclocking it with the help of this useful and user-friendly tool The bane of overclockers, perhaps even more than high temperatures and higher power consumption, is hardware instability. You tamper with a few clocks, maybe dial the voltage up or down a little, and all hell breaks loose. Consider giving OCCT a try if you're looking to test your system's stability. · Stability testing may be a long and arduous process, and monitoring your hardware can help reveal any underlying problems. Even if you're not one who overclocks, l
Rating: 5 ​
Find elsewhere
🌐
Overclock.net
overclock.net › home › forums › graphics cards › amd › amd drivers and overclocking software
Is OCCT reliable for checking errors and artifacts? | Overclock.net
Like right now, on stock voltage, ... if i go above that, OCCT will give me errors, even though the rest of the tests don't have a problem. ... It is my tool of choice it seems to do well for me....
🌐
Linus Tech Tips
linustechtips.com › the workbench › troubleshooting
Is OCCT good for stress test? - Troubleshooting - Linus Tech Tips
January 14, 2021 - Is OCCT good for testing the cpu temps and ram stability I will be buying the 5800x with nh-d15 cooler so I want to check the temps If OCCT is not good enough what to use Give your opinions please Thanks!
🌐
Overclock.net
overclock.net › home › forums › graphics cards › graphics cards - general
So how reliable is OCCT GPU stress test? | Overclock.net
OCCT is probably one of the better tests out there, that being said what is stable in one program doesn't mean it's stable in another. OCCT is what I consider an extreme test meaning even if you play a game that uses 100% of your GPU it won't ...
🌐
Tom's Hardware Forum
forums.tomshardware.com › home › graphics cards
Question - How reliable is OCCT? | Tom's Hardware Forum
July 22, 2025 - Since there aren't, it might seem that something corrupted the VRAM during that session, and when I rebooted and the VRAM was cleared, then the corruption went away. Is that a fair assessment? Or is OCCT just not too reliable and gave these errors when there were none?
🌐
AnandTech
forums.anandtech.com › home › hardware and technology › cpus and overclocking
Is OCCT reliable at all??? | AnandTech Forums: Technology, Hardware, Software, and Deals
October 22, 2008 - OCCT is reliable, it stopped it because it felt your CPU was too hot, in that case (given the set TJ max in OCCT) it stopped bc your CPU was 70C. It is a safety precaution.
🌐
Linus Tech Tips
linustechtips.com › computer hardware › graphics cards
Is OCCT Safe - Graphics Cards - Linus Tech Tips
April 27, 2015 - I have a G1 GTX 970 and I have heard a lot of good things about OCCT because of Its error checking feature but I've heard it can be dangerous Is This True Thanks
🌐
Ventoy
rtech.support › guides › how-to-use-occt
How to use OCCT | rTS Wiki
3 weeks ago - There are multiple type of tests to run OCCT, each dependent on what you will need to test. Here we will only describe the methods to run specific stability tests (Selected on the right hand pane of the application): ... Default values are best set here. Ensure the test is set at 1 hour, and all other configurations are set as default (Unless specified otherwise):
🌐
YouTube
youtube.com › watch
A (short) introduction to OCCT - Check stability in general or after OC - YouTube
Welcome to a short Introduction on OCCT (https://www.ocbase.com/). Most of you will be like WHAT? Let Me Explain.I stumbled across this one on reddit, and i...
Published   March 19, 2021
🌐
Softonic
occt.en.softonic.com › home › windows › games › utilities
OCCT - Download
October 10, 2025 - It is safe to download. ... OCCT has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of ...
Rating: 8.2/10 ​ - ​ 1 votes
🌐
Reddit
reddit.com › r/overclocking › is occt memtest accurate?
r/overclocking on Reddit: Is occt memtest accurate?
January 2, 2026 -

Is occt memtest accurate? It show no error after 30 mins of CPU + linpack + mem + GPU but windows resource monitor show a lot of mem hard faults some times even 300/s I'm running a cheap ahh whitelabel b550m, 5700g with pbo enabled and soc tension on 1125mv, 2 sticks of patriot viper 3200mhz cl18 overclocked to 3800 cl20 also overclocking my igpu to 2200mhz with 1200mv

edit: also sorry if I said something dumb it's my first time getting this deep into overclocking

Top answer
1 of 5
4
Man what are these commenters doing on an overclocking sub (more so the guy recommending to stay away from OCCT because the free version makes you wait 10 seconds before tests lmao) Having hard faults is normal, even multiple hundred a second for periods of time. What wouldn't be normal if it's all the time and/or your PC feels slow/laggy/stuttery The one other guy is right, run multiple stress tests. They all test different things in different variations, so a failure in even just one means bad memory. But yes OCCT's memory test is good, run it for minimum an hour though (I believe 2 hours is the maximum for the free version unless they changed that recently). I would also recommend to download Testmem5 (like they also mentioned). 1usmus config is good to run, but absolut by anta777 is the other really good config to use. It's best to do both, but at least do one of them overnight (7+ hours) If it passes on your xmp profile, you don't need to test it with xmp off, though. If it's stable on xmp it will be stable on xmp off If it fails on xmp, you can do an RMA. I'm pretty sure all vendors will accept the RMA if XMP is faulty since it's advertised by them, even tho technically it's only truly guaranteed to be stable at xmp off by the original chip manufacturers (I could be wrong but I think they do accept RMA even if XMP on is unstable but xmp off is stable, someone correct me if that's wrong because I've never had to RMA ram)
2 of 5
3
edit: also sorry if I said something dumb it's my first time getting this deep into overclocking Don't worry about it. You shouldn't be seeing that many hard faults per second. Can you download and execute TM5 with the 1usmus v3 @ 1usmus configuration file. If it fails reset BIOS and execute again. If it passes then disable PBO and any user amended settings. Execute the OCCT stability test again and check for errors. Use several stress-testing applications to confirm stability.
🌐
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?

🌐
AnandTech
forums.anandtech.com › home › hardware and technology › cpus and overclocking
Question - Your experience using OCBASE OCCT -- version 8 or earlier: What's your verdict? | AnandTech Forums: Technology, Hardware, Software, and Deals
March 21, 2021 - Running Prime95 for 24 hours is a huge inconvenience, even if one is replacing a machine still in service and doing it at a leisurely pace. I had discovered that the OCCT:CPU tests can uncover errors in an hour that wouldn't show through ten iterations of IBT or LinX.