By default, WMDT runs . Caching is partially enabled; Extended mode disables CPU caches to stress the RAM controller and DIMMs more aggressively.
WMDT ( MdSched.exe ) is a boot-time diagnostic. It runs outside Windows (in a minimal NT kernel environment) to obtain unfettered access to all physical RAM. memory test in windows
This paper provides a complete, actionable guide to memory testing in Windows, from basic usage to advanced troubleshooting, suitable for both academic reference and real-world IT application. By default, WMDT runs