Why is my Windows 11 using 11GB of RAM even when idle?

Unused RAM is essentially wasted, so Windows will preload frequently used apps into memory for quicker loading times. If the RAM is needed for another app, Windows releases it. It’s normal for memory usage to seem high, just make sure you’re not hitting your RAM limits, especially when idle—if it’s over 80%, it might be time to investigate further.

Windows often uses RAM to cache files it thinks you'll need soon. This helps speed up access to them later. If you have NVMe SSDs, the benefits of caching might not be as noticeable as before. You might want to check your startup applications too; some of them could be consuming more memory than expected.

You could check out tools like RAMMapper to see which applications are consuming your RAM. Sometimes it's not Windows itself but background processes that might be using more memory than they should. It's worth looking into your system specs too—those can give you clues on whether the high usage is normal for your setup.

If you've recently set up Hyper-V or other virtualization tools, they can consume a good chunk of RAM. That might be the culprit behind your high usage. Windows can manage memory well, but certain configurations can lead to unexpected RAM consumption.

Windows’ memory management is designed to use up available RAM for better performance by caching. If you’re only using a small fraction of your RAM for active tasks, Windows fills the excess with cached data. This can show high memory usage in Task Manager, but it's usually beneficial, unless you genuinely don’t have enough RAM.