- If Windows 10 isn't using all RAM, make sure that you have the right version installed.
- Checking that the existing memory is compatible with the motherboard is crucial.
- Tweaking some BIOS settings and testing your RAM can help if you're having this issue.

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Memory is a crucial resource since it allows you to enjoy multiple apps simultaneously on your PC. In case you run out of memory, you might encounter various performance issues.
In some instances, Windows 10 isn’t using all your RAM, and this can be a major problem because you have memory that won’t ever be accessed.
This means that you’re not using your computer to its full potential and utilizing its resources properly. Depending on the amount of unused RAM, this might lead to slowdowns and other problems.
Luckily, there are ways to deal with this issue, and in today’s guide, we’re going to show you how to fix the problem with unused memory.
Why isn’t my PC using all RAM?
There are several reasons for this, but most likely is that you’re using a 32-bit version of Windows. Alternatively, it might be your integrated graphics that is using some of your memory.

Incompatible or improperly arranged RAM can also cause problems such as these. Lastly, there’s always a possibility that your hardware is not working properly.
What happens when the PC isn’t using all of my RAM?
If your PC isn’t using all your RAM, you’ll have fewer resources to work with and you’ll experience a performance drop.
Let’s say you have 16GB of RAM, but your PC just detects 8GB. You’ll have twice as little memory to work with, and you’ll experience issues when multitasking or when using more demanding applications.
What can I do if Windows 10 isn’t using all RAM?
1. Use the 64-bit version of Windows


If you’re not using the 64-bit version, you’ll have to perform a clean install of Windows 10 with Refresh Tool. Keep in mind that this version requires a 64-bit processor.
The process will remove all files from your system partition, so be sure to back them up beforehand. After you install the 64-bit version of Windows, your PC should utilize all your available RAM.
Quick warning, if you already have a 64-bit version and Windows isn’t using all your RAM, there’s no need to reinstall it. Instead, try one of our other solutions.
2. Turn off Auto RAM Virtualization




After you make the necessary changes, restart your PC. Up next, check if the problem still appears. If not, you can enable Automatically manage paging file size for all drives feature again.
3. Check if your RAM is properly seated
If you’re not sure how to check your RAM, it might be best to contact an expert.
4. Check if your RAM is faulty

5. Rearrange your RAM modules
6. Change your BIOS settings
- Vitualization – ON.
- iGPU – OFF.
- Render Stability – Enabled
- iGPU memory – Auto
- Multimonitor – Disabled
- Frame Buffer Location – Below 4G


7. Use msconfig
NOTE
It’s also worth mentioning that many users managed to solve this problem simply by unchecking the Maximum memory option. If it is enabled in Windows, be sure to disable it and check if that solves the problem.



8. Modify your registry

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management


Many users reported error when accessing Registry, but that can be easily fixed.
9. Check if your RAM is compatible with your motherboard
Sometimes Windows 10 isn’t using all RAM since memory isn’t compatible with your motherboard. If that’s the case, the PC won’t recognize it and you won’t be able to use it.
To fix this problem, be sure to check your motherboard manual and see if your current memory modules are supported.
Some RAM models aren’t fully compatible with certain boards, and to fix this issue, you need to replace your memory with a compatible model.
10. Update your BIOS



For more information, be sure to visit our guide on how to flash BIOS.
11. Be sure that you’re using an official BIOS
According to users, this problem was caused by modified firmware. Some of them reported that Windows 10 wasn’t using all RAM because they had a modified version installed.
However, they managed to fix the problem by flashing their BIOS and using the one from the official source.
Modified versions can be unsafe to use, so be sure that you’re always using official firmware if you want to avoid any issues.
12. Check if you have integrated graphics


Integrated graphics cards use some of your RAM by design, so if you have one, Windows 10 won’t be able to use all of your memory.
To see how much memory does your graphics card use, and other important information, try using video card information software.
13. Check if BIOS recognizes your RAM

In case you can’t find a certain module, there might a problem with it, or you might’ve exceeded the RAM limit on your motherboard. Keep in mind that the latter only affects older devices.
Why does integrated graphics use my RAM?
Integrated graphics is built into your motherboard, and it doesn’t have its own memory, therefore it needs to use your memory to work.

Although you can stop the built-in GPU from using your RAM, you can limit the amount that is available to it from BIOS.
How does RAM work?
Your RAM works as high-speed temporary storage, and it allows your processor to quickly access the necessary data.
Data that is actively used, such as your applications, will be stored on it, allowing your PC to use them more efficiently.
Once you close the application, its data is removed from the memory, making space for other data or software to use.
If Windows 10 isn’t using all RAM, you might experience performance issues, but hopefully, these solutions should help you fix the problem.
There are several ways to address this issue, but if you didn’t manage to solve it, you can also limit RAM usage on your PC to optimize it.
Did we miss any of the solutions for this problem? If we have, let us know in the comments section below.
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