RAM either works perfectly or it doesn't. There is no middle ground. If your diagnostic tool finds a single error, your memory is compromised. Back up your data immediately, identify the faulty stick, and replace it. Your future self—the one not losing unsaved work to random BSODs—will thank you.
Restart and hold D immediately after the startup chime. memory diagnostic tool
Shut down your Mac, press and hold the power button until you see "Loading startup options." Press Command + D to launch Apple Diagnostics. RAM either works perfectly or it doesn't
Why your RAM might be the culprit—and how to catch it in the act. identify the faulty stick