Memtest: Test Your Computer's Memory for Errors

Unexpected Computer Issues and the Power of Memtest

Recently, one of my computers began exhibiting erratic behavior. At times, Windows would start normally and operate without issue for a period, only to have applications subsequently fail to launch or unexpectedly terminate. On other occasions, the system would be unable to boot without requiring multiple reset attempts.

Initially, I naturally suspected a problem with the Windows operating system. Several scans and diagnostic procedures were performed, but all reported no errors. Frustrated with the ongoing issues and unable to identify a solution, I opted to install Linux in a dual-boot configuration.

The Problem Persists

Approximately ten to fifteen minutes into a session with Linux, applications began to quit unexpectedly or were unable to start. This indicated the issue wasn't related to Windows.

I then became convinced that a hardware fault was the root cause. Having already verified the integrity of the hard drive, I wasn't sure where to focus my troubleshooting efforts.

During a subsequent reboot, I noticed the memtest86 entry within the GRUB boot menu. Although present after installing Ubuntu, I had completely overlooked it. I decided to run the test, and it quickly identified a faulty RAM module!

Understanding Memtest86

Memtest86 proves to be a highly effective solution for computer memory testing, though its interface can be somewhat complex for novice users. Let's clarify some of the options available if a thorough test is required.

The first step is to download Memtest86. It's recommended to create a bootable ISO image on a CD. This is often the simplest method for utilizing the tool.

Due to its widespread usefulness, Memtest86 is also integrated into several Live CD distributions, including Ubuntu and System Rescue CD.

Booting and Initial Operation

Once the CD is prepared, insert it and configure the computer to boot from it. Depending on whether you're using the standalone Memtest86 ISO or a Live CD, you'll either be taken directly to the test or need to initiate it through the available options.

Here's how to launch it from the Ubuntu Live CD:

memtest-awesome-tool-test-computers-memory-errors-1.jpg

Regardless of the method, once Memtest86 is running, it immediately begins testing the computer's memory without prompting for any input.

The interface displays basic memory information in the upper left corner, the current tests being executed in the upper right corner, and overall test results just below. Only detected errors are shown.

Interacting with Memtest86

At the bottom of the screen, you'll find controls for interacting with Memtest86. You can reboot the system at any time using the ESC key.

Use Lock/Unlock scrolling to view detailed error information if numerous errors are present. Enabling scroll lock also pauses the tests until it's disabled.

Pressing 'c' will access the configuration menu, allowing you to customize various settings and parameters. You can select from a range of different tests.

memtest-awesome-tool-test-computers-memory-errors-2.jpg

A detailed description of each test and the types of issues it detects is available online.

Configuration Options

Within the settings menu, you can also adjust the memory address range to be tested. It's generally best to perform a full memory scan, especially during the initial test. Subsequently, you can use custom values to focus on specific addresses if errors are identified.

You can also modify error display options and refresh the screen. These are the primary settings you should be concerned with. If you require access to advanced options, you likely already possess a strong understanding of Memtest86!

memtest-awesome-tool-test-computers-memory-errors-3.jpg

A Valuable Troubleshooting Tool

Memtest86 is an invaluable addition to any virtual troubleshooting toolkit. While memory errors, such as the one I encountered, are relatively uncommon, they can be incredibly difficult to diagnose. A quick memory scan can either eliminate memory as a potential cause or pinpoint the problem directly.

We'd like to hear your thoughts on Memtest86 or if you have a preferred alternative for computer memory testing.