Memtest86 User Guide Apr 2026

| Setting | Options | Description | |---------|---------|-------------| | Number of passes | 1–99, infinite | Full passes before completion | | Test selection | Individual test # | Run a single test | | Address range | Start/end in MB | Limit tested memory region | | CPU selection | All cores, 1 core, custom | Multi-core vs. sequential | | ECC polling | On/Off | Log ECC corrected errors | | Row Hammer mode | Standard, extended, aggressive | Sensitivity level | | Output log | None, USB, disk | Save report to file |

Here is the complete content of the (based on the official documentation for MemTest86 v10.x Free/Pro/Site editions). This guide covers setup, execution, interpretation of results, and advanced features. MemTest86 User Guide 1. Introduction MemTest86 is a stand-alone, pre-boot memory testing software for x86/ARM computers. It is designed to diagnose faulty RAM (Random Access Memory). It boots from a USB flash drive or CD/DVD without requiring an operating system. memtest86 user guide

The software is provided "AS IS" without warranty. Always backup data before testing memory. For the latest updates, visit the official user guide: https://www.memtest86.com/tech_guide.html MemTest86 User Guide 1

- -p2 (run 2 passes) - -t5 (run only test 5) - -e3 (stop after 3 errors) - -l (enable logging) MemTest86 can boot over network using UEFI HTTP boot or PXE. See the pxe/ folder in the download. 10.3 Automation via mt86.cfg Create a text file mt86.cfg on the boot drive with: It boots from a USB flash drive or