Understanding Hardware Reserved Memory
Many Windows users notice that a portion of their RAM is labeled as hardware reserved in the Task Manager. This memory is set aside for use by system devices such as the graphics card, network adapter, or motherboard components. When too much memory is reserved, the operating system has less available for applications, which can slow down performance. The amount of reserved memory can vary from a few hundred megabytes to several gigabytes depending on hardware configuration, driver settings, and system architecture. Fortunately, there are several effective methods to reduce or free this reserved memory. Below we explore these methods in detail.
Uncheck Maximum Memory in System Configuration
The first and often most effective step is to disable the Maximum Memory option in the MSConfig tool. This feature can artificially limit the amount of RAM visible to Windows, causing the rest to appear as hardware reserved. To access it, press Win + R, type msconfig, and press Enter. Go to the Boot tab, select your current operating system, and click Advanced options. In the new window, uncheck the box next to Maximum memory. Ensure no value is entered in the field. Click OK, Apply, and restart your computer. After the reboot, check Task Manager to see if the reserved memory has decreased. This solution is recommended by Microsoft support and often resolves the issue immediately. If the problem persists, proceed to other methods.
Update or Disable Reserved Memory Drivers in Device Manager
Some devices in Device Manager are labeled with names like Memory Reserved or High Precision Event Timer. These drivers may reserve memory unnecessarily. Open Device Manager by right-clicking the Start button and selecting Device Manager. Look under System devices for entries such as Memory reserved or High precision event timer. Right-click on them and choose Disable device. Be cautious: disabling the wrong driver can affect system stability. Only disable items that are explicitly related to memory reservation. A safer alternative is to update the drivers to the latest version provided by your motherboard manufacturer. Outdated or corrupted drivers can cause excessive memory reservation. After making changes, restart your computer and monitor the reserved memory amount. For detailed guidance, refer to the Tecnobits article on removing hardware reserved memory.
Disable AMD Turbo Core and Core Performance Boot in BIOS
If you have an AMD processor, certain BIOS settings may increase hardware reserved memory. Features like Turbo Core or Core Performance Boot can allocate memory for performance optimization. To adjust these, enter the BIOS during startup (usually by pressing Delete, F2, or F10). Navigate to the advanced CPU features section. The exact path varies by motherboard manufacturer but often includes menus like MB Intelligent Tweaker or Advanced CPU Core Features. Look for options named Turbo Core, Core Performance Boost, or similar. Set them to Disabled. Save changes and exit. This modification reduces the memory reserved by the CPU's internal management system. Many users have reported significant reductions after disabling these options, as noted in a Microsoft Answers thread.
Verify System Architecture: 32-Bit vs 64-Bit
A common reason for excessive hardware reserved memory is running a 32-bit version of Windows. A 32-bit operating system can only address up to 4 GB of RAM, and a portion of that is reserved for hardware. If you have more than 4 GB installed, the system will not recognize the extra memory. To check your system type, go to Settings > System > About and look for System type. If it says 32-bit operating system, you need to reinstall a 64-bit version of Windows to use all of your RAM. A 64-bit system can handle much larger amounts of memory, and hardware reservation is typically lower. Keep in mind that upgrading from 32-bit to 64-bit requires a clean installation, so back up your data first. This step is essential for anyone who built a PC with a 64-bit capable processor but installed a 32-bit OS by mistake.
Manually Configure the Paging File Size
Windows uses a paging file on the hard drive as virtual memory. If the paging file is incorrectly configured, the system may reserve more physical RAM. To adjust it, press Win + R, type perfmon /res, and press Enter. This opens the Resource Monitor. Alternatively, go to System Properties > Advanced > Performance > Settings > Advanced > Virtual memory change. Uncheck Automatically manage paging file size for all drives. Select your system drive (usually C:), choose Custom size, and set an initial and maximum size. Microsoft recommends setting it to 1.5 times your installed RAM for the initial size and 3 times for the maximum. For example, with 8 GB RAM, set initial to 12288 MB and maximum to 24576 MB. Click Set, then OK, and restart. This adjustment can sometimes reduce hardware reserved memory by optimizing how Windows handles memory allocation.
Common Causes of High Hardware Reserved Memory
Below is a list of typical reasons why your computer might reserve an unusually large amount of RAM. Understanding these can help you choose the right fix.
- Maximum Memory check box enabled in msconfig.
- Legacy or buggy device drivers, especially for graphics and network cards.
- AMD Turbo Core or Core Performance Boost enabled in BIOS.
- Running a 32-bit operating system with more than 4 GB RAM.
- Incorrect paging file size settings.
- Integrated GPU allocating fixed memory (often configurable in BIOS).
- Memory remapping feature disabled in BIOS (for older systems).
Comparison of Methods to Free Hardware Reserved Memory
The table below summarizes the effectiveness, difficulty, and reboot requirement for each method discussed.
| Method | Effectiveness | Difficulty | Requires Reboot |
|---|---|---|---|
| Uncheck Maximum Memory (msconfig) | High | Easy | Yes |
| Disable reserved memory drivers | Moderate | Medium | Yes |
| Disable AMD Turbo Core in BIOS | Moderate to High | Medium | Yes |
| Upgrade to 64-bit Windows | Very High | Hard | Yes (clean install) |
| Adjust paging file size | Low to Moderate | Easy | Yes |
Final Considerations and Additional Tips
After applying these methods, it is wise to monitor your system for a few days. Sometimes reserved memory decreases gradually after driver updates or Windows patches. If you still see high reservation, consider updating your BIOS to the latest version. Some motherboards have memory remapping options that must be enabled to properly address all RAM. Also, check if your integrated graphics is using shared memory; you can reduce its allocation in BIOS. For laptops with Intel graphics, the reserved amount may be fixed and cannot be changed. In such cases, adding more RAM can improve available memory. If none of these steps work, your hardware might have a limitation, such as an older chipset that cannot handle large amounts of RAM. Lastly, always create a restore point before making system changes.
References
Microsoft Q&A. (2023). Memória reservada para hardware – como desmarcar a opção "Memória Máxima" em msconfig. Retrieved from https://learn.microsoft.com/pt-br/answers/questions/3162359/mem-ria-reservada-para-hardware
Tecnobits. (2024). Como remover memória reservada de hardware no Windows 10. Retrieved from https://tecnobits.com/pt/como-remover-mem%C3%B3ria-reservada-de-hardware-no-windows-10/
Microsoft Answers. (2022). Meu Windows 10 reserva memória demais ao hardware. Retrieved from https://learn.microsoft.com/pt-br/answers/questions/2785426/meu-windows-10-reserva-mem-ria-demais-ao-hardware
Canaltech. (2020). O que significa memória reservada para hardware? Retrieved from https://canaltech.com.br/hardware/o-que-significa-memoria-reservada-para-hardware-215240/
Microsoft Q&A (Spanish). (2023). Cómo solucionar la memoria RAM reservada para hardware. Retrieved from https://learn.microsoft.com/es-es/answers/questions/3974210/c-mo-solucionar-la-memoria-ram-reservada-para-hard
