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Any Linpack test should be good. I'd say you're good. OCCT was a great program before it used Linpack so i don't know why it would change now.

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.com › r/overclocking › stock settings failed occt linpack test after 7 hours? all other tests pass

r/overclocking on Reddit: Stock settings failed OCCT Linpack test after 7 hours? All other tests pass

December 14, 2018 -

All other tests, including Prime95 and at least a 4-pass of Memtest86, so far have passed after at least 8-12 hours.

When I ran OCCT Linpack with AVX 64-bit 90% memory last night, it was going fine until it failed at just after the 7 hour mark.

I know that some would say that this isn't 'stable'... but is this something to worry about such as a failed component, or is it just a stressed hiccup of some kind that can be ignored?

I have:

- Intel 9900k with liquid metal and a Noctua DH-15s air cooler (temps max out at 80c on the Linpack test)

- 64GB of dual-channel Vengeance LPX 3000mhz at 2666mhz stock timings of 15-15-15-36

- Corsair Gold 1000watt PSU

- Asrock Z390 Taichi motherboard

Thanks

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No, don't worry about it. Those are power virus unrealistic tests, and there was discussion that many hyperthreaded threads actually will conflict with linpack and cause residual differences Is your CPU delidded? How do you have LM on your CPU? Did you put it between the IHS and heatsink? If so, what sort of barrier protection did you put around the socket?

Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

Comparing CPU Stresstests for stability? - CPUs, Motherboards, and Memory - Linus Tech Tips

November 29, 2022 - linpack name confuses me there · They are technically different, OCCT Linpack did a few minor tweaks to it IIRC, but practically speaking they're the same test with a different UI. I'd only run one or the other, not both.

reddit.com › r/overclocking › r7 2700 overclocking - occt vs linpack?

r/overclocking on Reddit: R7 2700 Overclocking - OCCT vs Linpack?

January 26, 2020 -

Got a question about R7 2700 overclocking/underclocking. I have been tweaking it for weeks now on my crappy Asrock board, and managed to get it to run stable at alright voltages/speeds that can have all cores pegged to 100% without roasting the chip. 4.0ghz at 1.25v, linpack stable for 96 hours, 3.8ghz stable at 1.175v for 96 hours. No system reboots or black screens even if I start a video encoder, YouTube or some other intense thing and run side by side or in the background.

Now - after that, I tried regular OCCT.

Got instant Black screens and BSODs in less than 2 minutes. Had to back it off to... get ready for it...

3.4ghz 1.35v

I had heard that OCCT was "intense" and used up the CPU's resources very well, but this difference is enormous!? Is it supposed to be that large? Or is this related to the new AGESA beta BIOS that I have been reading about, which fixes voltage leaks and other problems? So on the older AGESA version, parts of the CPU are just requiring way too many volts and whatever marginal part needs it is causing it to freeze?

Wondering if anyone more familiar with Ryzen and the latest overclocking tools can chime in with better insights.

I should probably just be happy with what I got and be done with it?

Ryzen 7 2700 @ 1.25v

4x16GB G.Skill TridentZ RGB DDR4-3200 CL14-14-14-34-48 1T (Samsung B-Dies for sure.) @ 1.45v

Thoughts?

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Which linpack software did you use? the linpack stress test in OCCT? OCCT's linpack test is using old libraries from 2012, so it's not reliable. Hmm... Maybe disable your RAM overclock, just to be 100% sure that it has nothing to do with memory. Run OCCT again maybe without any RAM OC You never know, Been thinking about how buildzoid talks about infinity fabric getting hot in certain stress tests and that can cause memory OC to fail for ryzen edit: Linpack Xtreme is the updated linpack stress test with latest libraries: https://www.techpowerup.com/download/linpack-xtreme/ This thing has been catching memory instabiity for me 100% on the second stress test run(10gb), always so far when I try to tighten timings.

reddit.com › r/occt › understanding linpack and memory allocation

r/OCCT on Reddit: Understanding Linpack and Memory Allocation

February 28, 2025 -

Hey y'all,

I am working on trying to resolve an issue with my buddies computer. It has been having random irq not less or equal bluescreens.

I started using OCCT and its various tests. It'll pass on memory, or cpu, or cpu and ram, but when I do linpack it'll bluescreened with the irq not less or equal again.

Is that always going to happen if I set the RAM allocation for the Linpack test to be 32000 MB? Or is this just showing me it's truly unstable?

Current specs:

Asrock Z790 Taichi

Intel 13900kf

32GB 2x16 G.Skill Trident Z5 RGB 6000 MT/S CL36

MSI Nvidia GeForce RTX 4080

Seasong Focus GX Gold 850W

It was a BLD from NZXT so it has a Kraken 240mm water cooler and various RGB Light Ring NZXT fans in an H7 Pro

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Has the microcode of the CPU been upgraded? There were issues with 13th and 14th gen Intel CPUs basically killing themselves by requesting too much voltage.

Ventoy

rtech.support › guides › how-to-use-occt

How to use OCCT | rTS Wiki

2 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): ... In case CPU stability does not reveal anything, you may run Linpack (a stress test from Intel), which also has decent error detection.

Tom's Hardware Forum

forums.tomshardware.com › home › overclocking

One hour of OCCT linpack test enough to deem overclock stable? | Tom's Hardware Forum

May 10, 2012 - I overclocked my i7 2600k to 4.5 GHz with 1.37VCore and ran the linpack test in OCCT for one hour, my temps were right around 70C at the hottest core, and the lowest core hovered around 60C, I then played crysis for about 3 hours and my temps never even hit 60 Celcius, the highest core then was...

reddit.com › r › AMDHelp › comments › 1ir58c4 › 5700x3d_whea_error_19_in_occt_linpack_2021

5700X3D: WHEA-Fehler 19 in OCCT LINPACK 2021

We cannot provide a description for this page right now

reddit.com › r/buildapc › occt power/linpack tests

r/buildapc on Reddit: OCCT power/linpack tests

December 10, 2020 - But if I run the Linpack CPU Linpack test (2019) or the Power test in OCCT (it says it should use OCCT and not Linpack for CPU in the power test?), it throws errors and crashes quickly.

Find elsewhere

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Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

Multiple 9th Gen Builds at Stock Failing OCCT Linpack - CPUs, Motherboards, and Memory - Linus Tech Tips

October 20, 2019 - Hi everyone. I've come across quite an oddity that I'm hoping someone has any knowledge on, or that at least someone else can confirm my findings. It seems as if there's a bug involving OCCT 5.0 and up when using the Linpack 2019 test and with the 9700K and 9900K (possible other 9th gen CPUs as w...

Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

OCCT Linpack, Cpu Tests both fail in a WHEA error. - CPUs, Motherboards, and Memory - Linus Tech Tips

March 12, 2023 - Basically my pc worked fine for a long time (2 years), but now when I play some really demanding games like apex, my pc crashes, turns up the fans and no screen at all. So I tried running FurMark and it passed, CPU-Z stresstest passed aswell, memtest86 on usb passed aswell. After stressing with P...

Tom's Hardware Forum

forums.tomshardware.com › home › overclocking

Question - first overclock to 5ghz. can you fail OCCT LINKPACK and still be " stable "occt | Tom's Hardware Forum

December 2, 2019 - Linpack excells as a stress tester simply because it is so brutal, but temps have to be ignored because it's so brutal. It'll go well and above any gaming scenario or even heavy loading like compiling or rendering. Asus Real Bench, OCCT, Aida 64 are also better at stress tests than Prime95, because they too 'bounce' and use a variety of stressors, in an attempt to trip up the pc if there's any instability.

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 - Somehow the the earlier chip, I'd ... me some "new stuff". OCCT has built-in a LinPack test and memory tests, with settings for "data set", "Mode" (normal or extreme) and Load type (variable or steady) -- as well as the instruction-set choices....

AnandTech

forums.anandtech.com › home › hardware and technology › cpus and overclocking

does OCCT's Linpack test actually tell you of CPU instabilities? | AnandTech Forums: Technology, Hardware, Software, and Deals

April 19, 2009 - Originally posted by: Rubycon OCCT's linpack is broken. Use OCCT's CPU test. If you want max heat/stress use Intel BurnIn or Lynx with Linpack. The PSU test produces a lot of stress however I was able to get another 50W out of the wall by running that along with Prime95!

GitHub

github.com › occt-power-supply-test

OCCT Power Supply Test · GitHub

May 19, 2026 - OCCT Power Supply Test CPU GPU Linpack variants push AVX-heavy paths; OCCT power supply test uses combined loads to ripple 12V lines—watch OEM cables.

PCMAG

pcmag.com › home › how-to › components › processors

How to Overclock Your AMD Ryzen CPU | PCMag

August 26, 2020 - In the main OCCT window, click the CPU: LINPACK tab and check all three of the boxes in the middle: 64 Bits, AVX Capable Linpack, and Use All Logical Cores. This will set OCCT to stress your CPU as much as possible—more so than you'll probably ...

CNET

download.cnet.com › occt › 3000-2094_4-75791900.html

OCCT for Windows - Free download and software reviews - CNET Download

February 26, 2026 - OCCT is a Windows application to check the stability. It enables you to 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 Supply.

Rating: 4.5 - 2 votes

OCBASE

ocbase.com › stabilityCertificate › 640a32cb2a3e08d8a064d917

OCBASE/OCCT - Cpu Silver stability certificate - 3/9/2023 7:26:03 PM - jadepone

A serious 3h stability test : 1h CPU Large Extreme, 30min CPU Small Extreme, 30 min Linpack v2021, 1h CPU Large ( 1 thread, cycling )

Tom's Hardware Forum

forums.tomshardware.com › home › overclocking

[SOLVED] - Stability testing with OCCT | Tom's Hardware Forum

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I'm trying to ensure that my overclock is rock-solid stable It's "rock solid stable" if your programs and system doesn't throw BSODs. You can have super stable HW and still have problems with OS and SW.

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I'm using R3 1200 @ 3.8GHz @ auto voltage. I ran Stable - 8 hours - Prime95 (Small FFTs, maximum temperature) Unstable - 20 runs - IBT (Very high) Stable - 12+ hours - OCCT CPU:Linpack (Linpack: 2019, memory 4096MB) What's the problem with IBT? When using Linpack 2019 from OCCT, the system remains stable. Is it a bug of IBT (old Linpack)? How reliable is OCCT? I don't hear much about it like Prime95 or AIDA64. Why are you torturing it ? Is system stable in normal use and doing benchmarks ? Those are tools for troubleshooting, not for making troubles.