Windows has a memory test tool built in called the Windows Memory Diagnostic. It runs on the next reboot to fully test system memory. Apple Diagnostics check m

Windows has a memory test tool built in called the Windows Memory Diagnostic. It runs on the next reboot to fully test system memory. Apple Diagnostics check memory as well, though maybe not as thoroughly as the Microsoft or memtest86 do (multiple passes). I've had memory errors that only appeared on two of eight passes through the whole memory test overnight. They certainly caused occasional issues with games though.