Run Memory Diagnostics ((install)) — How To

Sometimes the sticks are just loose. Turn off your PC, unplug it, remove the RAM sticks, and click them back into their slots firmly.

Apple includes a built-in diagnostic suite that checks RAM along with other hardware components. For Apple Silicon (M1, M2, M3): Shut down your Mac. how to run memory diagnostics

Click in the right-hand pane and search for "MemoryDiagnostics-Results". Sometimes the sticks are just loose

If the Windows tool doesn’t find anything but you still suspect issues, use . It is an industry-standard tool that runs from a bootable USB drive, allowing it to test your RAM without the interference of the operating system. Download: Get the free version from MemTest86.com . remove the RAM sticks