MemTest86 USB - The Standalone Memory Diagnostic Tool for UEFI

MemTest86 is the original, free, stand alone memory testing software for x86 and ARM computers developed by PassMark Software. MemTest86 boots directly from a USB flash drive (UEFI environment) and tests the RAM in your system for faults using an array of comprehensive industry-standard test patterns and algorithms.

Key Features of MemTest86:

• Native UEFI Boot Support: Graphical user interface supporting mouse and keyboard navigation, compatible with UEFI x86/x64 and ARM64 systems.
• 13 Comprehensive Memory Test Algorithms: Rigorous stress testing algorithms detecting subtle memory faults (including Row Hammer, Block Move, and Bit Fade tests).
• Bundled ImageUSB Creator: Comes packaged with PassMarks ImageUSB utility to write memtest86-usb.img onto your USB flash drive in seconds.
• Full Modern Hardware Compatibility: Supports DDR5, DDR4, DDR3, ECC RAM, and high-performance XMP / EXPO memory profiles.
• Detailed HTML Test Reports: Automatically generates and exports customizable benchmark and test summary reports to disk.

How to create a bootable MemTest86 USB drive:

1. Download and extract memtest86-usb.zip on your computer.
2. Insert a USB flash drive (minimum 1GB capacity; backup any existing files on the drive).
3. Launch imageUSB.exe, select your USB flash drive, ensure the disk image is selected, and click Write.
4. Reboot your system, enter the Boot Menu (usually F12, F11, F8 or ESC), and boot from the USB drive to start testing.