In this guide, you will learn exactly using built-in Windows tools, third-party software like MemTest86, and even macOS utilities.

If you have multiple RAM sticks, remove all but one. Run the Windows Memory Diagnostic or MemTest86 again. Repeat this process for every individual stick. This allows you to find out if only one specific stick is broken while the others are perfectly fine.

The fastest test with minimal checks (2–5 minutes).

If your RAM is overclocked (XMP/DOCP enabled) and you see errors, the issue might not be broken hardware, but unstable overclocking.

: Download the free version and use their "ImageUSB" tool to install it onto a flash drive.

Press on your keyboard to start the diagnostics. For Intel-based Macs: Shut down your Mac. Turn it back on and immediately press and hold the D key .

Files you use frequently or save recently become unreadable.

How to Run Memory Diagnostics: A Step-by-Step Guide to Testing Your RAM

Once finished, Windows will reboot. The results don't always pop up automatically. To see them:

Running the Windows Memory Diagnostic tool is the most direct way to check for RAM errors on your PC. It identifies hardware faults that cause blue screens, freezes, or system crashes. 🛠️ How to Start the Diagnostic Save all your work and close any open programs. Press , type mdsched.exe , and hit Enter .

Sometimes your RAM isn't broken; it's just being pushed too hard.

Few things are more frustrating in computing than an unexplained crash. You’re in the middle of an important project, a heated gaming session, or a critical video call, and suddenly—. Or perhaps your applications keep freezing, files become corrupted, or your computer randomly restarts without warning.