Memtest can run indefinitely so can be stopped after the first pass or at any time. However, if you want to make sure your computer has no errors with the memory it’s recommend you let the test run overnight. If no errors occur, it is unlikely your main memory is causing the problems with your computer.

  • How to fix errors with memtest or failures with all memory.
  • How to test computer memory to determine if it’s bad.
  • Memory (RAM) help and support.