Why Windows 11 still uses so much RAM

Open Task Manager on a Windows 11 PC and it’s easy to panic, no matter how much RAM you have. Even if you don’t have many applications open, your computer will likely use more than 50% of its memory. And while this seems like a problem, most of the time it isn’t. Although 16 GB of RAM is the standard for modern computers, that doesn’t mean it’s no longer enough just because your PC uses almost all of it. This has more to do with how modern versions of Windows manage memory.

First of all, it’s worth taking a look at RAM usage. Your computer’s memory temporarily stores the data your processor needs to run applications and open files. It offers much faster speeds than your hard drive or SSD, so it’s much faster to access data. The more RAM you have, the more items your computer can keep open and ready to switch. Multitasking becomes much better with more RAM.

The latest versions of Windows treat RAM as something to use, not something to keep. In the past, your computer only used the RAM needed to run currently open programs. However, unused RAM does nothing for you: it ends up being a waste of resources. What Windows does now is figure out what you might need to run soon and keep it in RAM. It might be an app you open often or a file you work on regularly. This makes your computer much faster because Windows already has what you need preloaded.

This all happens under a process called SysMain (or SuperFetch in older versions of Windows). It learns your computer’s usage habits to keep important parts cached in idle memory. If you open Chrome every morning, chances are Windows keeps it in RAM for you. The time it takes to open an app preloaded in RAM is significantly shorter than loading it from your storage drive. As a result, you may notice that your PC is using more than half of its available RAM, or sometimes almost 100%.

To see what’s happening, tap Ctrl+Shift+Esc open Task Manager. Then go to Performance tab on the left and select Memory – ignore Used and look Available instead. Cached data is considered available because Windows can retrieve it instantly. The more RAM you have, the more Windows can use to keep your apps and files cached. This is why you shouldn’t worry about the amount of RAM used in sleep.

Despite this intelligent management, excessive RAM usage can still sometimes be a problem. If you’ve noticed that your computer is running slowly or applications are crashing, or if you’re receiving alerts that your computer is low on memory, there may be something else going on.

In this case, check the Process tab in Task Manager to see which apps are using the most RAM and close the ones you don’t need. Also restart your PC if it’s been a while. This will fix memory leaks (a problem where a program does not return the memory it has used to the available pool). Make sure to disable startup apps you don’t use so they don’t hog memory in the background.

Some third-party “memory cleaner” apps claim to help reduce RAM usage, but they are generally not worth using. Although they can reduce the percentage of memory used, the fact that applications switch to the paging file (a part of your storage drive that Windows uses as a backup, simulating RAM) makes them slower. These apps are also not a long-term solution, since the system will eventually reload everything again.

Some people choose to disable SysMain completely and revert to the old RAM management system. Although we don’t recommend it in most cases, on an older PC with a mechanical hard drive, constant preloading can occupy the disk and make the system slow. If this is your case, press Win + Rtype services.msc and search SysMain. Open its Propertiesclick Stop and set the startup type to Disabled. This will prevent Windows from preloading files and applications into your RAM.

But again, we don’t recommend this unless you’re using an old system with a hard drive lacking RAM. If you’re still stuck with 8GB of RAM (or less), the right solution is to upgrade to 16GB or more, even though RAM is more expensive than ever. Meanwhile, you can also try changing a few settings to improve your experience on Windows 11 PCs.