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Memtest86+ 4.00

1 2009 09 23 3785 views

Memtest86 is a comprehensive, stand-alone memory diagnostic. Memtest86+ is software designed to stress test an x86-compatible computer's random access memory (RAM) for errors. It tries to verify that the RAM will accept and correctly retain arbitrary patterns of data written to it.

Memtest86+ is designed to run from a bootable floppy disk, CD-ROM, USB Drive, or from a suitable bootloader without an operating system present. Memtest86+'s tests are comprehensive so it can find otherwise hidden problems on machines that appear to work normally. With many chipsets, Memtest86+ allows counting of failures even in error-correcting ECC DRAM.

Memtest86 was originally developed by Chris Brady; Memtest86+ is developed by Samuel Demeulemeester. The first version of Memtest86+ was released on early 2004, based on memtest86 v3.0 that was not updated since mid-2002.

Memtest86+ writes a series of test patterns to every memory address, reads back the data written, and compares it for errors. Information about the chipset can be used to enhance these tests — particularly in an overclocked system. Many chipsets can report RAM speeds and timings, and some even support changing the memory timings on the fly; in this way, Memtest86+ can test that memory remains error-free with the more aggressive settings.

Enhancements in v4.00:
   * New Features
              o Major Architectural changes
              o First pass twice faster (reduced iterations)
              o Detect DDR2/3 brands and part numbers on Intel DDR2/3 chipsets
              o Added detection for Intel "Clarkdale" CPU
              o Added detection for Intel "Gulftown" CPU
              o Added detection for AMD "Magny-Cours" CPU
              o Added detection for Intel XMP Memory
              o Added for CPU w/ 0.5/1.5/3/6/12/16/18/24MB L3
              o Added "clean" DMI detection for DDR3/FBDIMM2
              o Better detection of Integrated Memory Controllers
   * Bug Fixes
              o Corrected detection for Intel "Lynnfield" CPU
              o Corrected detection for AMD 45nm K10 CPU
              o Solved crash with AMD Geode LX
              o Complies with SMBIOS 2.6.1 specs
              o Fixed compilation issues with gcc 4.2+
              o Many others bug fixes