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Memtest86 PRO Edition 5.1.0 (ISO/USB)

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Memtest86 PRO Edition 5.1.0 (ISO/USB) | 10 Mb

Memtest86 is considered by the majority of the hardware testing community the number one application when it comes to defective RAM sticks. The answer to the question regarding the working state of the installed memory modules comes fast with Memtest86 and that is what matters the most besides the certainty of the verdict.

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 MemTest86does just this.

What's New in Version 5?
MemTest86 supports booting from both the newer UEFI platform and the traditional BIOS. When booting from UEFI, MemTest86 has access to additional services not available in BIOS including:
Native 64-bit support
No longer requires the use of the PAE workaround to access more than 4GB of memory. (PAE = Physical Address Extension)
Mouse support, where supported by the underlying UEFI system. On older systems a keyboard is still required.
Improved USB keyboard support. The keyboard now works on systems that fail to emulate IO Port 64/60 correctly. So Mac USB keyboards are now supported.
Improved multi-threading support, where supported by the underlying UEFI system.
Reporting of detailed RAM SPD information. Timings, clock speeds, vendor names and much more.
Support to writing to the USB drive that MemTest86 is running from for logging and report generation. In all prior MemTest86 releases, there was no disk support.
Use of GPT. (GUID Partition Table)
ECC RAM support (limited hardware support, ongoing development)
Detection of ECC support in both the RAM and memory controller
Polling for ECC errors
Injection of ECC errors for test purposes. (limited hardware only)
DDR4 support (but we are currently having problems sourcing DDR4 RAM to test)
Option to disable CPU caching for all tests
Having a configuration file to allow settings to be pre-defined without the need for keyboard input. This can help with automation.
Support for Secure Boot.
Speed improvements of between 10% and 30%+. Especially for tests, #5, #8 & #9. This is the result more moving to native 64bit code, removing the PAE paging hack, switching compilers and using faster random number generation algorithms.
Addition of 2 new memory tests to take advantage of 64bit data and SIMD instructions.

Version 5.1.0 16/May/2014
Fixed ECC error detection for Ivy Bridge-E chipsets
Fixed rounding of memory SPD timings
On 32-bit systems, systems with upper address limit > 32-bits freezing during testing is now fixed
Locking memory for testing is now more robust
Added SPD support for VT8237S, Intel X79, Intel NM10 Chipsets
Fixed incorrect decoding of # of banks in DDR2 FB SPD causing the memory stick size to be reported incorrectly
Increased the number of supported memory modules from 16 to 32
Increased the maximum number of SMBus controllers to 8
DDR3 revision 1.3 SPD decoding now supported
Fixed SMBUS CLK issues when retrieving SPD details for Intel chipsets
CPU spec updates, AMD Kaveri + Intel Haswell refresh
Xeon (Ivy Bridge and later) non-Turbo CPU speeds now recorded.
Minor temperature reporting changes for AMD Family 15h, Models 0h-0Fh and 30h-3Fh (e.g. A10-7850K)
Fixed "Pass" progress bar so that it shows 100% on completion of one pass
A notification text is now displayed when ECC errors are injected
Improved notificaion text displayed when ECC errors are detected
Updated MemTest86 BIOS version to 4.3.7

System Requirements:
UEFI or BIOS platform firmware
Windows, Linux
CD or USB Flash Drive

Language : English

Home Page - http://www.memtest86.com


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网友最新评论 (1)

  1. Memtest86是极品内存检测软件,测试准确度比较高,内存的隐性问题也能检查出来
    sunsource(特殊组-翻译)2年前 (2014-08-28)