MemTest86+
- Android app
- Not listed
- Free plan
- Yes
- Runs on
- Linux, Mac, Windows
Summary
MemTest86+ is a free, open-source stand-alone memory tester for x86, x86-64, ARM AArch64, and LoongArch64 computers. It uses algorithms such as moving inversions and Modulo-20 to look for memory failures that may contribute to crashes, freezes, or system instability. The tester can access almost all computer memory without operating-system memory or UEFI library restrictions. It can start from legacy or UEFI BIOS, use Linux boot protocols, or run from a FAT32 USB flash drive, CD-ROM, or PXE network boot. The project documents memtest.bin for BIOS PXE and memtest.efi for UEFI PXE as iPXE or PXELINUX payloads. Testing runs indefinitely, and the pass counter advances after all selected tests complete. The software is licensed under GNU GPL version 2, with no additional restrictions on private or commercial use. Stable and nightly binaries are available, but nightly builds are generated automatically and are untested and unsupported. Secure Boot must be temporarily disabled because the binary is not signed by Microsoft.
Who it is for
MemTest86+ suits users diagnosing possible memory failures or instability on supported computer architectures. It can be booted from removable media or configured for network boot.
What is good
- Free and open source under GPL version 2.
- Tests several computer architectures.
- Can boot from USB, CD-ROM, or PXE.
- Runs outside normal operating-system memory restrictions.
- Supports legacy and UEFI boot modes.
What to know first
- Secure Boot must be temporarily disabled.
- USB drivers are still work in progress.
- Not all USB devices are supported.
- Nightly builds are untested and unsupported.
Verdict
MemTest86+ provides a bootable way to investigate memory problems across several architectures. Account for its Secure Boot requirement and USB-device limitations when choosing how to run it.
MemTest86+ plans and pricing
All plansCompared on PC overclocking software
- Free plan
- Yesmemtest.org
- Platform support
- multi-platformmemtest.org
- Stress testing
- Yesmemtest.org
- Memory testing
- Yesmemtest.org
- Disk health checks
- Nomemtest.org
- GPU testing
- Nomemtest.org
- Bootable diagnostic media
- Yesmemtest.org
Facts
- Purpose
- Memtest86+ is a free, open-source, stand-alone memory tester for IA-32, x86-64, and LoongArch64 systems.memtest.org · 1 Oct 2026
- Memory access
- It can access almost all computer memory without being restricted by operating-system memory or UEFI libraries.memtest.org · 1 Oct 2026
- Architectures
- The README says it supports x86, x86-64, ARM AArch64, and LoongArch64 computers.memtest.org · 1 Oct 2026
- Boot modes
- It can run directly from legacy or UEFI BIOS or through Linux boot protocols.memtest.org · 1 Oct 2026
- Testing purpose
- It uses various algorithms to detect memory failures and troubleshoot crashes, freezes, and system instability.memtest.org · 1 Oct 2026
- Supported media
- It can run from a FAT32 USB flash drive, CD-ROM, or network boot using PXE.memtest.org · 1 Oct 2026
- Network boot
- For PXE, memtest.bin can be used with BIOS PXE and memtest.efi with UEFI PXE as an iPXE or PXELINUX payload.memtest.org · 1 Oct 2026
- Algorithms
- Its documented algorithms include moving inversions and Modulo-20 testing.memtest.org · 1 Oct 2026
- Execution
- Memtest86+ executes indefinitely, and the pass counter increments after all selected tests have run.memtest.org · 1 Oct 2026
- Secure Boot
- The binary is not signed by Microsoft, so Secure Boot must be temporarily disabled.memtest.org · 1 Oct 2026
- USB limitation
- The USB drivers are still work in progress and not all USB devices are supported.memtest.org · 1 Oct 2026
- License
- Memtest86+ is released under GNU GPL version 2 with no restrictions beyond the GPL for private or commercial use.memtest.org · 1 Oct 2026
- Build environment
- The build is tested on Linux and uses the GNU toolchain, including GCC, binutils, and make.memtest.org · 1 Oct 2026
- Release support
- Stable and nightly binaries are available, but nightly builds are automatically generated, fully untested, and unsupported.memtest.org · 1 Oct 2026
- Support channel
- The project asks users to submit bug reports on its official GitHub page with hardware and reproduction details.memtest.org · 1 Oct 2026
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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