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MemTest86 is the original, free, stand alone memory testing software for x86 and ARM computers.

MemTest86 boots from a USB flash drive and tests the RAM in your computer for faults using a series of comprehensive algorithms and test patterns.

PassMark MemTest86 supports all current technologies:

• 13 different RAM testing algorithms - including row hammer fault detection
• All RAM types supported (DDR2, DDR3, DDR4, DDR5, SODIMM, XMP, ECC)
• Self-booting off USB or Network (PXE) boot, without needing DOS, Linux nor Windows
• Optimized for UEFI-based x86/ARM systems
• Native 64-bit code (since version 5)
• ECC error detection & injection
• Secure Boot verified – Code signed by Microsoft
• Graphical interface with mouse input
• Save logs and create customizable HTML reports
• Full test automation via configuration file
• Support for memory blacklisting in Windows (badmemorylist) and Linux (BADRAM)