MemTest86

MemTest86
Original author(s)Chris Brady
Developer(s)PassMark Software
Initial release1994 (1994)
Stable release
11.3 (Build 1000)  / 2 May 2025
Written inC, assembly language
Available in12 languages
List of languages
English, French, German, Czech, Polish, Russian, Spanish, Portuguese, Italian, Catalan, Japanese, Chinese
TypeUtility
Licensefreeware, proprietary license
Websitewww.memtest86.com 
Memtest86+
Developer(s)Martin Whitaker, Sam Demeulemeester
Initial release2004 (2004)
Stable release
7.20  / 11 November 2024
Repository
Written inC, assembly language
Available inEnglish
TypeUtility
LicenseGNU General Public License, version 2.0
Websitewww.memtest.org 

MemTest86 and Memtest86+ are memory test software programs designed to test and stress test an x86 architecture computer's random-access memory (RAM) for errors, by writing test patterns to most memory addresses, reading back the data, and comparing for errors. Each tries to verify that the RAM will accept and correctly retain arbitrary patterns of data written to it, that there are no errors where different bits of memory interact, and that there are no conflicts between memory addresses.