OCCT memtest is pretty reliable from the testing I've seen. Use AVX if you want to stress the dimms more, SSE if you want to stress the IMC more. Answer from Resune33 on reddit.com
OCBASE
ocbase.com
OCBASE/OCCT : Free, all-in-one stability, stress test, benchmark and monitoring tool for your PC
OCCT is the authority for certifying the stability of the systems and components tested, providing assurance and peace of mind to users and stakeholders alike. ... Gain speed and productivity by quickly identifying differences between two reports or custom certificates.
Reddit
reddit.com › r/overclocking › occt memory test reliable?
r/overclocking on Reddit: OCCT memory test reliable?
September 25, 2020 -
See UPDATE below.
Does anyone know if the memory test in OCCT 6.2.2 is actually reliable?
I noticed in their changelog that they recently changed how it works in 6.2.0.
After hours of running it will sometimes show that it found 2, 4 or 6 errors, and sometimes I've restarted and used the same settings that previously gave errors with no errors for 22h+. I also previously tested the memory with the same settings with memtest86 pro 8.3 for > 34h with no errors.
I'm testing using an AMD Ryzen 9 3900x, Asus ROG Strix B550-I Gaming, GSkill Ripjaws V 64GB DDR4 3600 C18.
UPDATE: Under Linux running Linpack I saw an correctable MCE, which appears to be related to Infinity Fabric. But since it was correctable it didn't cause an error in Linpack. So the rare error the sometimes shows up under OCCT might be uncorrectable IF errors. That would potentially explain why it seems so random. I'll to see if I can make the errors go away entirely by increasing the voltage for IF. According to the developer OCCT 6.x doesn't report MCEs but version 7.x will.
Videos
08:09
OCCT v17 Beta - NEW MEMORY TEST UPDATE - YouTube
09:16
How To Use OCCT In Extreme Mode - YouTube
06:14
How to Use OCCT for Stress and Stability Testing | Test - RAM | ...
10:22
Pruebas de memoria RAM con OCCT en PC GAMING - YouTube
How To Use OCCT | Stability Tester
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 › benchmark › memory › 610072980655001719773aa2
OCBASE/OCCT Memory Benchmark - Read
OCBASE/OCCT Memory Benchmark (Tyllo) - DDR4 - 2 channel(s) : 1555.60
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, m...
Reddit
reddit.com › r › OCCT
OCCT - Help, Feature requests, Bug reports,...
September 28, 2020 - The first OCCT v17 beta last month introduced a full redesign of the Memory Test, rebuilt entirely from scratch around a highly modular architecture.
VideoCardz
videocardz.com › news › benchmarks
OCCT v17 beta launches with rebuilt Memory test inspired by TestMem5 and MemTest86 - VideoCardz.com
April 10, 2026 - OCCT has announced v17 open beta with a full redesign of its Memory test. The new version replaces the older fixed approach with a modular system that lets users build their own memory stress routines.
Facebook
facebook.com › groups › ASUSPCDIY › posts › 9152688624814143
Why does my PC fail OCCT test after 10 minutes ...
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Tom's Hardware
tomshardware.com › pc components › cpus
OCCT With Four Options - How We Stress Test CPUs
August 16, 2020 - It might not generate the massive ... tests. The software can log a number of important parameters, running in an endless loop or stopping after a defined length of time. 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 ...
Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5822477 › whea-logger-1-need-help-with-this
WHEA_Logger 1 - Need help with this - Microsoft Q&A
March 14, 2026 - Memory tests and OCCT stress tests passed and XMP/overclocking are disabled.
Overclock.net
overclock.net › home › forums › amd › amd - general
Sorry I'm a newb, what settings or OCCT stress test? | Overclock.net
Originally Posted by AMOCO;12059141 Large Data,But prime95 stresses more memory than OCCT. Click to expand... Hmmm, well so far I can only get my rinky dink 945 up to 3.69 with a temp of about 55c. I'm not sure how to OC the mem either. SO i'll have to look up that. ... Originally Posted by AMOCO;12059224 watercool that baby,then u won't have to worry about your temps. Click to expand... I dunno, i've always been afraid of that. lol. water in a PC. Never sat right with me. On a similar note, I've been stress testing with OCCT for 15 minutes....I smell a little burning.
Gobik
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SilverPC Blog
blog.silverpc.hu › kezdőlap › decoding your occt ram errors: a step-by-step guide to diagnosing your memory
Decoding Your OCCT RAM Errors: A Step-by-Step Guide to Diagnosing Your Memory - SilverPC Blog
October 19, 2025 - While excellent for initial checks, OCCT often takes the crown for its ability to push a system to its absolute limits, revealing instabilities that milder tests might miss. OCCT isn’t just a CPU stress-tester; its dedicated memory test routine is incredibly thorough, utilizing various instruction sets to truly challenge your RAM and the CPU’s integrated memory controller (IMC).
Corsair
corsair.com › explorer › diy builder › memory › how to test ram
How to test RAM | CORSAIR
December 10, 2024 - From the Test Selection, you can pick the different memory tests (it is recommended to leave 13 selected to test your memory thoroughly) and the number of passes required for the test.
Mediaket Tutorials
tutorials.mediaket.net › mediaket tutorials › software tutorials › occt free: friendly step by step guide to using it
OCCT Free: Friendly Step by Step Guide to Using it
May 15, 2026 - Under "Memory Configuration," choose a test pattern (e.g., "All"). Leave "Threads" set to "Auto." Click the big green START button. Want to see how your system behaves under normal use? Use this mode. In the left menu, click Monitoring Only. Click the big green START button. OCCT will now just display real-time stats without stressing your components.
SilverPC Blog
blog.silverpc.hu › kezdőlap › getting a lot of occt errors? here’s how to understand and troubleshoot them
Getting a Lot of OCCT Errors? Here’s How to Understand and Troubleshoot Them - SilverPC Blog
October 18, 2025 - Use the OCCT memory test or a dedicated memory testing tool like Memtest86.
Tom's Hardware Forum
forums.tomshardware.com › home › cpus
[SOLVED] - OCCT test is always crashing on CPU test | Tom's Hardware Forum
March 6, 2021 - Whenever I try to run an OCCT test, it always crashes. I faced with a similar issue on Prime95. On OCCT, It crashes after 1 second. In Prime95, one of my cores always dies in the first few seconds. The thing is I don't have any stability or similar problems while using the PC. I playe a few...
YouTube
youtube.com › watch
OCCT PERSONAL 15.0.13 Stability test MEMORY
To learn more, please visit the YouTube Help Center: https://www.youtube.com/help
SilverPC Blog
blog.silverpc.hu › kezdőlap › my occt cpu+ram test returned errors – how do i diagnose this?
My OCCT CPU+RAM Test Returned Errors – How Do I Diagnose This? - SilverPC Blog
October 20, 2025 - OCCT is renowned for its ability to push your central processing unit (CPU) and system memory (RAM) to their absolute limits. When an error occurs during one of its strenuous tests, it’s a clear signal that a component, or a combination of components, is failing to maintain stability under significant stress.