Windows 11 users can restrict total system memory for testing and debugging purposes by adjusting the Maximum memory setting within the legacy System Configuration tool, also known as msconfig.

Key Points

• Access the memory limit setting by searching for "msconfig" and navigating to the Boot tab's Advanced options.
• Users must input the desired memory limit in megabytes, such as 4096 for 4GB or 8192 for 8GB.
• A system restart is required to apply the memory restriction or to restore full RAM access.
• Modern systems with UEFI firmware and Secure Boot enabled may require temporarily disabling security features to modify these settings.
• This configuration is strictly for testing or troubleshooting and is not recommended for improving everyday system performance.

Why it Matters

Artificially limiting RAM is a specialized diagnostic technique used by developers and IT professionals to simulate low-memory environments without hardware changes. Using this setting for general use is counterproductive, as it significantly degrades system performance and restricts the operating system's ability to manage resources efficiently.