MemTest86

You test the working memory outside your regular operating system from a bootable USB stick.

Developer PassMark Software

Version 11.7 build 1000 · Freemium · Windows · Linux

Looking for an alternative to MemTest86?Compare TechPowerUp MemTest64.Compare alternatives

MemTest86 checks RAM with different test patterns. You start the computer from a USB stick made for that purpose, so the test doesn't depend on your normal Windows installation. This helps in investigating breakers, blue screens or suspected memory instability.

The current version uses UEFI. An error message may be associated with a memory module, settings, the memory controller or other hardware. So the test doesn't simply indicate one broken part. The free and paid editions differ in testing and reporting options.

Which software suits you?

Compare MemTest86 with alternatives

Memory tests differ mainly in the environment in which they run. A test outside your operating system can approach memory differently from an app within Windows. Plan enough time and interpret errors in connection with settings, modules and the rest of your hardware.

Differences between MemTest86 and TechPowerUp MemTest64
SoftwareWhat can it do?Platform and licence
MemTest86You are viewing this app Test working memory from a bootable environment outside Windows. You need to restart the computer with the appropriate test medium. Windows, LinuxFreemium
TechPowerUp MemTest64View this alternative You test available working memory from Windows without a separate boot medium. The memory that Windows and other processes use is not freely available in the same way. WindowsFree to use

Choose an alternative to explore its features, system requirements and download options.

Who is it for?

You're investigating recurring instability and want to check the RAM separately.

Getting started

With the official tool, create a bootable USB stick and choose it from the UEFI boot menu. Check carefully which USB drive is described.

Privacy

The test is running locally. A report contains hardware data; check it before you share it publicly.

Good to know

The current edition is for UEFI systems. The free and Pro version do not offer the same tests and reporting options.

Please note

Creating the boot stick can erase existing data on that USB stick. Choose the right disk and save the contents in advance.

Advantages

  • Test outside the operating system Multiple memory patterns Reporting of found errors

Things to consider

  • Need bootable USB and UEFI Testing may take a long time An error does not always identify one defective component

Download MemTest86

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Version history

11.7 build 1000

You get more extensive hardware recognition and corrections around DDR5 information.

Version 11.7 build 1000 adds LPCAMM2 recognition and reporting. ECC support for Intel Bartlett Lake and corrections around DDR5 temperatures have also been included.
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Our verdict

MemTest86 makes sense if you want to support a suspicion of memory instability. Testing outside the operating system helps to exclude some of the software influences. Especially with new modules or custom memory settings, this gives extra information.

A flawless round does not prove that every possible malfunction is excluded. Run sufficient tests and compare them with standard memory settings if necessary. In case of errors you can then systematically examine modules or settings. Don't change everything at once, or you won't know what the difference was. For a stable computer, this is not a program that you need to use daily.

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