How to test your Computer’s RAM for problems

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The most common reason people test their computer’s memory is to resolve issues with repeated crashes. If you frequently get BSODs, a RAM test is a good way to diagnose issues. This is especially the case if the BSOD error message makes reference to computer memory. We’ve found faulty RAM to be to blame for specific error messages like the common “Page Fault in Nonpaged Area” error.

It’s also a smart move to run a memory test as soon as you install new RAM sticks. It’s not unheard of for manufacturers to ship out RAM (and other hardware) that’s dead on arrival, so putting your brand new RAM to the test right out of the box will let you spot manufacturer issues and get a replacement before the problem hardware interupts your gaming sessions.

Solutie

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Option 1: Run the Windows Memory Diagnostic

Windows has a built-in RAM testing tool. It’s included on Windows 10, Windows 11, Windows 7, and all other modern versions of Windows.

  • To launch the Windows Memory Diagnostic tool, open the Start menu, type “Windows Memory Diagnostic”, and press Enter.
  • You can also press Windows Key+R, type “mdsched.exe” into the Run dialog that appears, and press Enter.
  • You’ll need to reboot your computer to perform the test. While the test is happening, you won’t be able to use your computer.
  • To agree to this, click “Restart now and check for problems (recommended).” Be sure to save your work first. Your computer will immediately restart.

Your computer will restart and the Windows Memory Diagnostics Tool screen will appear. Just leave it be and let it perform the test. This may take several minutes. During this process, you’ll see a progress bar and a “Status” message will inform you if any problems have been detected during the process.

However, you don’t need to watch the test—you can leave your computer alone and come back to see the results later.

When it’s done, your computer will automatically reboot and return to the Windows desktop. After you log in, the test results will appear. At least, that’s what the tool says is supposed to happen. The results didn’t automatically appear for us on Windows 10 and Windows 11. But here’s how to find them, if Windows doesn’t show you.

  • First, open the Event Viewer. Right-click the Start button and select “Event Viewer”. If you’re using Windows 7, press Windows Key+R, type “eventvwr.msc” into the Run dialog, and press Enter.
  • Navigate to Windows Logs > System. You’ll see a list of a large number of events. Click “Find” in the right pane.
  • Type “MemoryDiagnostic” into the find box and click “Find Next.” You’ll see the result displayed, as well as additional details about your RAM, at the bottom of the window.
  • The text doesn’t wrap inside the window, so you can’t see it in the screenshot above, but in our case Windows returned a message stating no errors were found in our RAM.

Option 2: Boot and Run MemTest86

If you’re looking for a more powerful testing tool, you can download and use MemTest86. It performs a wider variety of tests and may find issues that the included Windows test won’t. The latest releases of this tool offer a paid version with more features, although the free version should do everything you need. You don’t need to pay for anything. MemTest86 is signed by Microsoft, so it will work even on systems with Secure Boot enabled.

If you’re looking for another option, you could also try the free and open-source MemTest86+. However, we’ve used MemTest86 for a long time.

Both of these are bootable, self-contained tools. MemTest86 provides a USB image you can copy to a USB drive. Just run the EXE file included with the download and provide a spare USB drive to create a bootable USB drive. Once you’ve created bootable media, restart your computer and tell it to boot from the USB drive you copied the memory test tool to.

The tool will boot and automatically start scanning your memory, running through test after test and informing you if it finds a problem. It will keep running tests until you choose to stop it, allowing you to test how the memory behaves over a longer period of time. Information about any errors will be displayed on your screen. When you’re done, you can just press the “Esc” key to exit it and restart your computer.

Tip solutie

Permanent

Impact colateral

What to Do If a Memory Test Finds Errors

If memory tests give you errors, it's very possible that your RAM—at least one of the sticks—is faulty and needs to be replaced. We recommend you contact your PC's manufacturer for service if it's still under warranty.

If you have some spare RAM lying around, you can swap out your current RAM sticks and see if your PC runs reliably with different RAM. Or, if your PC has multiple sticks of RAM, you can try removing one and see if that helps—you may be able to determine the RAM component that is failing and replace it.

If you've built your own PC or just installed RAM yourself, it's also possible that the RAM isn't compatible with your motherboard for some reason. It's also possible that your RAM can't reliably run at its current speeds, so you may want to adjust your RAM speed to a lower setting in your UEFI or BIOS settings screen.

After making a change, you can run the RAM test again to see if there's a problem. If nothing seems to work and your RAM seems to need replacing, you'll want to take a look at our picks for the best DDR4 RAM or DDR5 RAM sticks.

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