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Memtest86+Karhu RAM Test
Free

Free and open source under the GPL v2.

 Paid

Sold as a paid license by Karhu Software.

Windows, Linux Windows
  • Runs without an operating system, from BIOS or UEFI
  • Supports 32-bit and 64-bit x86 plus LoongArch64
  • Runs inside Windows without rebooting
  • Built for validating memory overclocks
  • Requires rebooting the machine to run a test
  • No ARM support
  • Windows only; Linux support was announced but not shown as available
  • Paid license
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Works offline

Checked October 1, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.