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 Home » Freeware Downloads » Hardware Testing and Diagnostics » Memtest86 Free Edition Linux/Mac USB (Flash Drive) image 7.5   
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Memtest86 Free Edition Linux/Mac USB (Flash Drive) image 7.5
MemTest86 is a free, thorough, stand alone memory test for x86 architecture computers.

There are many good approaches for testing memory. However, many tests simply throw some patterns at memory without much thought or knowledge of memory architecture or how errors can best be detected. This works fine for hard memory failures but does little to find intermittent errors. BIOS based memory tests are useless for finding intermittent memory errors.

RAM chips consist of a large array of tightly packed memory cells, one for each bit of data. The vast majority of the intermittent failures are a result of interaction between these memory cells. Often writing a memory cell can cause one of the adjacent cells to be written with the same data. An effective memory test attempts to test for this condition. Therefore, an ideal strategy for testing memory would be the following:

Write a cell with a zero.
Write all of the adjacent cells with a one, one or more times.
Check that the first cell still has a zero.
It should be obvious that this strategy requires an exact knowledge of how the memory cells are laid out on the chip. In addition there are a never ending number of possible chip layouts for different chip types and manufacturers making this strategy impractical. However, there are testing algorithms that can approximate this ideal and MemTest86 does just this.

For the ISO download you will need a blank CD\DVD and a program that can burn an ISO image.

Version 7.5 5/Feb/2018


Added check for whether the number of errors exceed a maximum error count. If so, the tests are aborted. This can be configured via the configuration file parameter MAXERRCOUNT. By default the value is 10000
Added support for Russian language
Added new configuration file parameter EXITMODE for specifying whether to shutdown or reboot the system on exit
Added support for reporting to Management Console ( via XML messages over TFTP (Site Edition only). The status of MemTest86 is periodically reported to the management console
Added new configuration file parameter TFTPSERVERIP for specifying a different TFTP server IP address for sending report files and reporting to the management console (Site Edition only)
Added workaround for retrieving configuration files from TFTP servers that don't support the 'get file size' TFTP command (Site Edition only)
Added workaround for Serva bug when overwriting a file on the TFTP server (Site Edition only)
Fixed bug with generated HTML/XML files that require character escaping
Added workaround when firmware EFI_GET_TIME function fails to retrieve the time correctly. A warning is also written to the log file
Added new flag DISABLE_CONCTRL to blacklist for console control workarounds for older firmware
Fixed 'ALL' BIOS versions not being parsed properly in blacklist
Updated blacklist.cfg file with additional baseboards with known issues
Added more robust detection of CPU hyperthreads
Added ECC detection support for Intel Skylake-SP chipsets
Added ECC detection/injection support for AMD Ryzen chipsets
Added warning message to log file when ECC injection is locked on Atom C2000 chipsets
Fixed bug with ECC error reporting on Intel Xeon E3 chipsets
Fixed CPU temperature not being shown for Intel Apollo Lake, Skylake-X and Broadwell-E chipsets
Added preliminary support for retrieving CPU info for Intel Cannon Lake/Knights Mill chipsets
Fixed bug with retrieving the number of boosted P-states in AMD chipsets
Fixed CPU temperature not being read properly on AMD 15h (model >= 40h) chipsets

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Downloads Views Developer Last Update Version Size Type Rank
2,082 6,414 Passmark Software <img src=""border="0"> Feb 06, 2018 - 11:54 7.5 6.75MB GZ 5/5, out of 25 Votes.
File Tags
Memtest86  Free  Edition  Linux/Mac  USB  (Flash  Drive)  image  7.5  

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