Mays Waredis – January 31, 2022

Memtest86+

LATEST VERSION : 5.31b

Last UPDATE : 12/04/2020

Based on the well-known original memtest86 written by Chris Brady, memtest86+ is a port by some members of the x86-secret team, at present working at world wide web.canardpc.com. Our goal is to provide an up-to-date and completly reliable version of this software tool aimed at retentiveness failures detection. Memtest86+ was, is and will ever exist a free, open-source software.
The original Memtest86 is now handled by PassMark® Software Pty Ltd.

Memtest86+ is released under the terms of the Gnu Public License (GPL). No restrictions for use, private or commercial exist other than the ones mentioned in the Gnu Public License (GPL). Texts nigh the original version was taken from the original website and written by Chris Brady.

PS : A newsletter for memtest86+ updates is available / Donation for Memtest86+ welcome. Please back up costless GPL software

Near Memtest86+
- History
- Alter log
- Screenshots
- Download (Pre-congenital & ISOs)
- Download (Source Lawmaking)
- Features requests
- Bug Fixes requests
- Official Forum
- Newsletter

About the original Memtest86 (Unchanged)
- Online Commands
- Retentiveness Sizing
- Mistake Display
- Troubleshooting Retentiveness Errors
- Change Log
- Acknowledgments

About tests performed
- Memory Testing Philosophy
- Memtest86 Test Algorithms
- Private Test Descriptions

Nearly the authors & contributors
- Author of Memtest86+
- Contributors of Memtest86/Memtest86+
- Donation from memtest86+ / Donator list

-= History =-

The kickoff version of Memtest86+ was released on early 2004, based on memtest86 v3.0 that was not updated since mid-2002. Our main challenge was to provide an up-to-date version of this useful tool, as reliable than the original. Our work started when nosotros got the first AMD64 arrangement. Unfortunatly, the original memtest v3.0 didn't run at all. Later looking at the source code, we fixed the bug.Later some days, I saw lot of other things like chipsets or CPU that were not correctly detected or not detected at all. As I'm the chief-editor of a french hardware website (www.x86-secret.com now integrated into www.canardpc.com), I have access to lot of contempo hardware and I can exam and debug on quite all available motherboards on the market. After adding detection for all current CPUs, I've added detection for all current chipsets (Sister, VIA, nVidia, Intel) and ECC Polling for AMD64, i875P and E7205. And so, I decided to display some useful settings for the most popular chipsets. For exemple, on i865PE/i875P serial, memtest86+ will now display FSB & Retention frequency, PAT status, memory timings, ECC status and the number of memory channels. Next version will possibly contain several enhancements and bug-fixes.

-= Change Log =-

Hither is all the latest change logs for memtest86+ :

*** Enhancements in v5.31b : ***

After a long hiatus without updates and following numerous requests, I've started compiling many codes branches to release public builds again! Here is Memtest86+ v.31b, with many bug fixes in the core functions. This build is non ready for production however, because it lacks some feedbacks from beta-testers. Additional features and updated detection code will follow before long, as soon I have access to my lab with all the reference test platforms. It'southward currently inaccessible due to the COVID19 lockdown.
If you lot detect a problems or regression in this build, delight transport your feedback to memtest (-A-) memtest.org. Thank you!

Enhancements in v5.01 :

Added support for up to ii TB of RAM on X64 CPUs
Added experimental SMT support up to 32 cores (Press F2 to enable at startup)
Added complete detection for memory controllers
Added Motherboard Manufacturer & Model reporting
Added CPU temperature reporting
Added enhanced Fail Safe Fashion (Press F1 at startup)
Added support for Intel "Sandy Span-E" CPUs
Added support for Intel "Ivy Bridge" CPUs
Added preliminary support for Intel "Haswell" CPUs (Cadre 4th Gen)
Added preliminary support for Intel "Haswell-ULT" CPUs
Added support for AMD "Kabini" (K16) CPUs
Added support for AMD "Bulldozer" CPUs
Added support for AMD "Trinity" CPUs
Added back up for AMD E-/C-/G-/Z- "Bobcat" CPUs
Added back up for Intel Atom "Pineview" CPUs
Added back up for Intel Atom "Cedar Trail" CPUs
Added SPD detection on virtually AMD Chipsets
Enforced Coreboot support
Optimized run time for faster memory error detection
Rewriten lots of memory timings detection cod
Corrected bugs, bugs and more bugs (some could remain)

Enhancements in v4.20 :

Added failsafe mode (press F1 at startup)
Added support for Intel "Sandy Bridge" CPU
Added support for AMD "fusion" CPU
Corrected some memory brands not detected properlyt
Various bug fixes

Enhancements in v4.10 :

Added support for Cadre i7 Extreme CPU (32nm)
Added support for Cadre i5/i3 (32 nm)
Added back up for Pentium Gxxxx (32 mn)
Added support for Westmere-based Xeont
Added preliminary back up for Intel SNB A0-footstep
Added support for AMD 6-cores CPU
Added detection for Intel 3200/3210
New installer for USB Key
Corrected a crash at startup
Many others bug fixes

Enhancements in v4.00 :

Major Architectural changes
First pass twice faster (reduced iterations)
Observe DDR2/iii brands and part numbers on Intel DDR2/3 chipsets
Added detection for Intel "Clarkdale/Gulftown" CPUt
Added detection for AMD "Magny-Cours" CPU
Added detection for Intel XMP Retentiveness
Added for CPU westward/ 0.five/1.five/3/6/12/sixteen/18/24MB L3
Added "clean" DMI detection for DDR3/FBDIMM2
Corrected detection for Intel "Lynnfield" CPU
Corrected detection for AMD 45nm K10 CPU
Solved crash with AMD Geode 60
Complies with SMBIOS 2.six.1 specst
Stock-still compilation issues with gcc iv.2+
Many others problems fixes

PS : Memtest86+ "3.00" was skipped and renamed 4.00 in club to avoid defoliation with the original Memtest.

Enhancements in v2.11 :

Added support for Intel Core i5 (Lynnfield) CPU
Added support for Intel P55 Southbridge
Added support for Intel PM45/GM45/GM47 Mobile chipset
Added back up for Intel GL40/GS45 Mobile chipset
Corrected DDR2/DDR3 detection on Intel x35/x45
Corrected detection on some Core i7 CPU
Fixed a bug with some AMI BIOS (freeze at startup)
Diverse bug fixes

Enhancements in v2.10 :

Added support for Intel Core i7 (Nehalem) CU
Added back up for Intel Atom Processors
Added support for Intel G41/G43/G45 Chipsets
Added support for Intel P43/P45 Chipsets
Added support for Intel US15W (Poulsbo) Chipset
Added support for Intel EP80579 (Tolapai) SoC CPU
Added support for ICH10 Southbridge (SPD/DMI)
Added detection for Intel 5000X
At present fully aware of CPU w/ L3 enshroud (Core i7 & K10)
Added workaround for DDR3 DMI detection
Fixed Intel 5000Z chipset detection
Fixed Memory Frequency on AMD K10
Stock-still cache detection on C7/Isaiah CPU
Fix Memtest86+ not recognized equally Linux Kernel

Enhancements in v2.01 :

Added support for i945GM/PM/GME & i946PL/GZ
Added support for iGM965/iGL960/iPM965/iGME965/iGLE960
Added detection for Sister 649/656/671/672
Added detection for i430MX/i430TX
Added an optional beep mode (pass completed westward/o error)
Laissez passer duration 20% reduced
Removed the blinking cursor
Reverted Test #0 to cached
Solved a major bug in Memory Accost Errors Reporting
Patched for Intel-Powered Mac
Corrected Intel iii-Serial (P35/X38) chipset init
Corrected a bug with SPD Display and ESB6300
Right a detection problems on P965/G965 C-Stepping
Solved a incoherency with pass progress indicator
Patched Makefile to compile on x86_64
Bootable Memtest86+ ISO more than uniform

Enhancements in v2.00 :

Major Architectures changes
Modulo test now use random pattern for better accuracy
Added Advanced DMI Errors Reporting Way
Added support for bus ratio changes on Intel Core CPU
Added support for non-integer bus ratio on latest Intel CPU
Added SPD Data Display for all Intel Chipsets (more to come)
Added series support as a linux boot parameter (Cheers to Michal Southward.)
Added preliminary support for VIA CN Isaiah CPU
Added preliminary support for Intel Nehalem
Added support for VIA C7/C7-D/C7-Thou/Eden on Esther Core
Added support for AMD K10 (Phenom) CPU w/ timings detection
Added support for Intel Pentium E due west/ 1 MB L2 Cache
Added support for Intel Core 2 45nm (Penryn)
Added support for FSB1333/FSB1600 Intel CPU
Added support for Intel 5400A/5400B w/ timings detection
Added support for Intel Q35/P35/G33/Q33 w/ timings detection
Added support for Intel X38/X48 west/ timings detection
Added preliminary support for Intel 5000P/V/Z
Removed on-fly retentivity timings change (unstable)
Numerous (really) bug fixes

-= Screenshots =-

Some screenshots of memtest86+ on third recent platforms (i865/i875 - nForce2 - AMD64) :

memtest86+ on i875P

Memtest86+ V1.00 on i875P

memtest86+ on nF2

Memtest86+ V1.00 on nForce2

memtest86+ on amd64

Memtest86+ V1.00 on AMD64

-= Download (Pre-built & ISOs) =-

Here is some pre-compiled distributions of memtest86+. Memtest86+ comes in three different way, first is a pre-build bootable ISO, 2nd is a bootable binary and third an installable package for creating a bootable floppy. Third version are compressed in .zilch and .tar.gz.

** Memtest86+ V5.31b (12/04/2020)**

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)

Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zippo)

Download - Auto-installer for USB Key (Win vii/8/10)

* Memtest86+ V5.01 (27/09/2013) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zip)
Download - Auto-installer for USB Key (Win 9x/2k/xp/vii)
Download - Pre-Compiled packet for Floppy (DOS - Win)

* Memtest86+ V4.twenty (25/01/2011) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Auto-installer for USB Key (Win 9x/2k/xp/7)
Download - Pre-Compiled EXE file (Pure DOS - Obsolete)
Download - Pre-Compiled package for Floppy (DOS - Win)

* Memtest86+ V4.x (04/05/2010) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Auto-installer for USB Cardinal (Win 9x/2k/xp/7)
Download - Pre-Compiled EXE file (Pure DOS - Obsolete)
Download - Pre-Compiled bundle for Floppy (DOS - Win)

* Memtest86+ V4.00 (22/09/2009) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.nil)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Pre-Compiled EXE file for USB Key (Pure DOS)
Download - Pre-Compiled package for Floppy (DOS - Win)

* Memtest86+ V2.11 (22/12/2008) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Pre-Compiled EXE file for USB Fundamental (Pure DOS)
Download - Pre-Compiled parcel for Floppy (DOS - Win)

* Memtest86+ V2.10 (15/11/2008) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.nix)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Pre-Compiled EXE file for USB Key (Pure DOS)
Download - Pre-Compiled parcel for Floppy (DOS - Win)

* Memtest86+ V2.01 (21/02/2008) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.null)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Pre-Compiled EXE file for USB Key (Pure DOS)
Download - Pre-Compiled parcel for Floppy (DOS - Win)

* Memtest86+ V2.00 (08/02/2008) *

Download - Pre-Compiled Bootable ISO (.gz)
Download - Pre-Compiled Bootable ISO (.zip)
Download - Pre-Compiled Bootable Binary (.gz)
Download - Pre-Compiled Bootable Binary (.zi
Download - Pre-Compiled EXE file for USB Key (Pure DOS)
Download - Pre-Compiled parcel for Floppy (DOS - Win)

-= Download (Source Lawmaking) =-

Here is the source code (under GPL) :

** Memtest86+ V5.31b (12/04/2020) **

Download - Memtest86+ V5.31b source code (.tar.gz) - 223 KB

* Memtest86+ V5.01 (27/09/2013) *

Download - Memtest86+ V5.01 source lawmaking (.tar.gz) - 209.3 KB

* Memtest86+ V4.20 (25/01/2011) *

Download - Memtest86+ V4.10 source lawmaking (.tar.gz) - 263.1 KB

* Memtest86+ V4.10 (04/05/2010) *

Download - Memtest86+ V4.10 source lawmaking (.tar.gz) - 263.1 KB

* Memtest86+ V4.00 (22/09/2009) *

Download - Memtest86+ V4.00 source lawmaking (.tar.gz) - 263.one KB

* Memtest86+ V2.11 (22/12/2008) *

Download - Memtest86+ V2.11 source code (.tar.gz) - 139.8 KB

* Memtest86+ V2.x (15/11/2008) *

Download - Memtest86+ V2.10 source code (.tar.gz) - 139.8 KB

* Memtest86+ V2.01 (21/02/2008) *

Download - Memtest86+ V2.01 source code (.tar.gz) - 139.viii KB

* Memtest86+ V2.00 (08/02/2008) *

Download - Memtest86+ V2.00 source code (.tar.gz) - 139.eight KB

-= Author of Memtest86+ =-

Memtest86+ is written past Samuel DEMEULEMEESTER, primary editor of www.x86-secret.com (visit us). You tin can send an email to memtest[nospam]@memtest.org (sad for the syntax, remove [nospam]). But don't expect an answer...

PS : Once more, the original writer of memtest86 is Chris Brady (www.memtest86.com)

-= Contributors of Memtest86/Memtest86+ =-

The initial versions of the source files bootsect.S, setup.S, head.S and build.c are from the Linux ane.2.1 kernel and have been heavily modified.

Doug Sisk provided code to support a console connected via a serial port.

Code to create BadRAM patterns was provided by Rick van Rein.

Screen buffer code was provided by Jani Averbach.

On-fly timings alter for A64/i865/915 was provided past Eric and Wee

Eric Biederman reworked the build process making it far simpler and besides to produce a network bootable ELF image. He produce a prissy patch in mid-2003 which was included in memtest86+

Memtest86+ Loader (and lots of assistance) was provided past Eric Auer.

Udo Rader create a piece of code for improve badram back up (remove duplicate)

Thank you to Franck Delattre (world wide web.cpuid.org) for his help.

Thank you to Michal Schmidt, Yann D. and Warren Togami for unvaluable support

Thanks to Remko van der Vossen (aka Wichetael) for the FAQ

Thanks to CDH for his help.

Cheers to lechenejb for memtest86+ logo.

Thanks to all five.xx contributors, especially Passmark guys.

Cheers to all Beta-testers.

-= Donation for Memtest86+ =-

We occasionally receive email that enquire for a doantion, so, here is the donation department ! So, if you've found memtest86+ useful - maybe it saved you some coin or helped you lot to sympathise an result that'southward been bothering y'all for ages - then delight consider making a donation to back up free software and help us face costs that occur (webhosting, ownership of some hardware for debugging, ...etc). Don't forget donations are very welcome, but by no means required. Even so, they will directly increases the amount of time we can spend on developing mt86+. Any amount is greatly appreciated.

As an individual, your name will be asked in the Paypal's form and it will be added to this folio as a mt86+ donator. Due to numerous abuses, we reserve the correct to remove companies' names, especially when they are non related to IT. We only accept truthful donations. Nosotros don't sell links on our website for SEO purposes!

Donators List (Cheers !) :