MemTest86+

7.1easy start · #3 of 30
in PC Overclocking Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

MemTest86+ is ranked #3 of 30 in PC overclocking software on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

MemTest86+ plans and pricing

All plans

Free and open-source Free stand-alone memory tester · GPLv2 · private or commercial use memtest.org · 1 Oct 2026

Compared on PC overclocking software

Free plan: Yes
Platform support: multi-platform
Stress testing: Yes
Memory testing: Yes
Disk health checks: No
GPU testing: No
Bootable diagnostic media: Yes

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The record

Purpose: Memtest86+ is a free, open-source, stand-alone memory tester for IA-32, x86-64, and LoongArch64 systems.
Memory access: It can access almost all computer memory without being restricted by operating-system memory or UEFI libraries.
Architectures: The README says it supports x86, x86-64, ARM AArch64, and LoongArch64 computers.
Boot modes: It can run directly from legacy or UEFI BIOS or through Linux boot protocols.
Testing purpose: It uses various algorithms to detect memory failures and troubleshoot crashes, freezes, and system instability.
Supported media: It can run from a FAT32 USB flash drive, CD-ROM, or network boot using PXE.
Network boot: For PXE, memtest.bin can be used with BIOS PXE and memtest.efi with UEFI PXE as an iPXE or PXELINUX payload.
Algorithms: Its documented algorithms include moving inversions and Modulo-20 testing.
Execution: Memtest86+ executes indefinitely, and the pass counter increments after all selected tests have run.
Secure Boot: The binary is not signed by Microsoft, so Secure Boot must be temporarily disabled.
USB limitation: The USB drivers are still work in progress and not all USB devices are supported.
License: Memtest86+ is released under GNU GPL version 2 with no restrictions beyond the GPL for private or commercial use.
Build environment: The build is tested on Linux and uses the GNU toolchain, including GCC, binutils, and make.
Release support: Stable and nightly binaries are available, but nightly builds are automatically generated, fully untested, and unsupported.
Price from: Free

Where it ranks on The Geeks Club

Best PC Overclocking Software in 2026#3 of 30
Best Hardware Diagnostic Software in 2026#3 of 25

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Sources

memtest.org· checked 1 Oct 2026
memtest.org/readme· checked 1 Oct 2026
memtest.org/dev· checked 1 Oct 2026