MemTest64

At a glance

• Editor score
  6.6 / 10
• Pricing
  Free plan
• Best for
  Portable free Windows memory testing
• Free plan
  Yes
• Paid from
  Free
• Stress testing
  Yes
• Facts checked
  20 Sep 2026

• Where it wins

  • Runs without installation, registry changes, rebooting, or DOS mode
  • Uses multiple algorithms and physical-memory test patterns
  • Supports modern Intel Core and AMD Ryzen processors

• Where it doesn't

  • Windows-only utility
  • Focuses on memory rather than storage or graphics diagnostics
  • Does not provide bootable media or reports

Our verdict on MemTest64

MemTest64 is a free, standalone Windows utility for checking system memory for hardware-level problems. It is aimed at Windows users who need a portable way to examine memory stability, including people tuning memory timings or DRAM speeds. The utility runs inside Windows and supports 64-bit versions of Windows XP through Windows 11. Its portable operation also suits situations where installing software or changing system settings is undesirable.

The core diagnostic workflow centers on physical-memory test patterns, multiple detection algorithms, automatic error detection, and a configurable amount of memory to test. MemTest64 can run without rebooting, DOS mode, administrator privileges, installation, or registry changes. That combination keeps the tool focused on direct memory checks while allowing users to control the scope of a test. Support for modern Intel Core and AMD Ryzen processors further aligns it with current Windows systems. Buyers choosing MemTest64 should be looking specifically for memory stability diagnostics rather than a broader hardware test suite.

MemTest64 is a practical fit for users who want a free Windows memory tester with minimal setup and no paid tier to evaluate. Its narrow scope is also its main boundary: it does not address storage or graphics diagnostics, provide bootable media, or produce reports. Users who need those capabilities should choose a product built around broader hardware coverage or formal reporting. For portable, in-Windows memory checking, MemTest64 offers a concentrated feature set; for multi-component diagnostics or workflows that require bootable testing, it is not the right choice.

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MemTest64 pricing

MemTest64 fact sheet

Alternatives to MemTest64

• HPHP PC Hardware DiagnosticsFree Windows and UEFI diagnostics with stress tests, logs, and failure IDs.9.3
• Blackwire Hardware DiagnosticsBroad bootable hardware diagnostics with a free plan and optional reporting tiers.9.2
• PDPC-Doctor ToolboxA broad Windows diagnostic toolkit for technicians, with a low-cost commercial tier.9.0

See all MemTest64 alternatives →

Featured on iTechGuides

MemTest64 is listed in our Hardware Diagnostic Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update