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 Home » Freeware Downloads » Hardware Testing and Diagnostics » Memtest86 Free v9.0   
File - Download Memtest86 Free v9.0

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Memtest86 Free v9.0

industry standard for memory diagnostics

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

Boots from USB flash drives to test the RAM in your computer for faults.

Utilizing algorithms that have been in development for over 20 years.

Industry standard since 1994.


PassMark MemTest86 supports all current technologies:

13 different RAM testing algorithms - including row hammer fault detection*
All RAM types supported (DDR2, DDR3, DDR4, 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 Ė 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)
Multi-language support (Chinese, German, Russian, Spanish & more)


IMPORTANT: MemTest86 V8 images support only UEFI boot. On machines that don't support UEFI, MemTest86 will not boot. Please download the older V4 BIOS release for CD or V4 BIOS release for USB of MemTest86 instead.
Installation and usage instructions are available on the Technical Information page
MemTest86 is a stand-alone program that does not require or use any operating system for execution. The version of Windows, Linux, or Mac being used is irrelevant for execution. However, you must use either Windows, Linux or Mac to create a bootable USB drive.

System Requirements

x86 (32/64-bit) or ARM64 based hardware
UEFI platform firmware
Windows, Linux, or Mac OS
USB Flash Drive (>= 512MB capacity)


Version 9.0 10/Feb/2021

New Features
Support UEFI-based ARM systems (arm64/aarch64), including memory test algorithms ported to ARM64 and optimized using hand-written assembly code. Special thanks to Simula eX≥ project ( for providing high-end ARM64 systems for testing.
Added BADRAM & badmemorylist formatted strings and instructions in the exported HTML report to mask defective memory addresses (Pro only)
Revamped RAM SPD screen in the Main Menu with graphical view of all RAM slots
Added preliminary support for DIMM temperature reporting (when supported by DIMM)
Added option to change save location of logs/reports to another disk volume (file system)
Added prompt on various exit options (shutdown, reboot, exit to BIOS) on application exit.
Added keyboard shortcut (F12) to save screenshot to file within the Main Menu
Support for saving test results to a byte-packed, binary file for storage-limited systems
Support for passing configuration parameters via command line arguments
Added new config file parameter, 'EXACTSPDSIZE', to specify the total capacity of all detected SPD to match before allowing tests to begin
Added new config file parameter, 'MEMREMMB', for specifying the minimum amount of memory to leave unallocated during testing
Added new config file parameter, 'MINMEMRANGEMB', for specifying the minimum size of memory ranges that shall be allocated for testing
Added new config file parameter, 'AUTOREPORTFMT', for specifying report format of auto-saved reports
Added new config file parameter, 'PMPDISABLE', to disable TFTP uploading of XML messages for Management Console integration
Added new config file parameter, 'RTCSYNC', to sync real-time clock with PXE server (via a periodically updated 'CurrentTime.txt' served by the PXE server)
Added new config file parameter, 'VERBOSITY', for specifying the verbosity level of the debug output
Added new config file parameter, 'TPL', to specify the UEFI task priority level of the MemTest86 application
Support for per-baseboard configuration file via baseboard-prefixed filename (eg. "Surface Pro-mt86.cfg")
Optimized/removed stale 32-bit code in memory tests
Improved test coverage by alternating between ascending/descending assignment order of CPU cores between passes when running in parallel mode
Track CPU core/thread ID of detected memory errors, and include the list of CPUs in error in test summary/report
Added tracking and reporting of min/max/average CPU + DIMM temperatures (when supported by DIMM)
Added SMBIOS memory device info to reports
Modified DRAM address ECC error reporting from (Column,Row,Rank,Bank) -> (Channel,Slot,Rank,Bank,Row,Column)
Added serial number of DIMM module experiencing ECC errors in report (supported chipsets only)
Added channel/slot information of detected SPDs in report (supported chipsets only)
Fixed 100% CPU usage when waiting for input in main menu
Improved UI drawing performance for better responsiveness
Generate beeps of Piezo Speaker on test end (if available)
Changed to large, coloured PASS/FAIL message box on test end
Changed to large, coloured FAIL message box on failed pre-test SPD checks
Fixed Test 12 errors in HTML report being truncated
Updated blacklist to work around new UEFI bugs Apple added to their UEFI firmware
Updated blacklist to work around Microsoft/Huawei laptops with display issues related to screen resolution
Fixed crash on VirtualBox due to reading of non-existent MSRs
Include system information details in TestResult XML messages to PXE Server (Site Edition)
Display error when there is a TFTP transfer error when sending Status XML messages to PXE server (Site Edition)
Fixed escaping of chars to XML entities when generating messages to PXE Server (Site Edition)
Output additional lines to console during MemTest86 boot
Fixed detection of uncorrected ECC errors for AMD Ryzen chipsets
Fixed ECC detection for > 2 channels for AMD Ryzen chipsets
Fixed ECC support for multiple CPU dies for AMD Ryzen chipsets
Fixed ECC error detection on AMD Ryzen chipsets with multiple CPUs
Added preliminary support for AMD Ryzen ECC reporting via error count registers when PFEH is enabled
Fixed ECC detection for Intel chipsets that use error count registers
Added ECC support for different Intel Coffee Lake chipset variants
Added disabling of SMI for Intel Kaby Lake chipsets to allow ECC errors to be detected
Added ECC support for Intel Comet Lake chipsets
Added preliminary support for decoding of system address to socket/channel/rank/bank/row/column address on Broadwell-DE. This information is logged in the log file.
Fixed incorrect reporting of ECC capabilities for chipsets with multiple IMCs
Added support for retrieving CPU info for Intel Gemini Lake chipsets
Added preliminary support for retrieving CPU info for Intel Ice Lake chipsets
Fixed potential unstable behaviour when increasing the target multiplier for Intel Silvermont chipsets
Fixed enabling turbo mode on Intel Silvermont chipsets
Updated temperature offsets for AMD Ryzen chipsets
Added preliminary support for reading AMD Ryzen 5000 (Family 19h) chipset temperatures
Updated EDK2 library to edk2-stable202008
Fixed memory leak when exiting program
Revised Portuguese translations
Updated unifont.bin file with higher weight Russian glyphs
Removed PassMark contact information from reports

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Downloads Views Developer Last Update Version Size Type Rank
4,015 9,908 Passmark Software <img src=""border="0"> Feb 10, 2021 - 12:17 9.0 8.34MB ZIP 5/5, out of 44 Votes.
File Tags
Memtest86  Free  v9.0  
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