The fastest way to check your RAM

Open Settings, then select System and About. Look for the line that says "Installed RAM" — that number is what you have. On Windows 11 and Windows 10, this takes about 10 seconds and requires no other tools.

If you prefer not to open Settings, right-click This PC or My Computer on your desktop, select Properties, and the RAM amount appears near the top of the window. Both methods show the same information.

Mac users can click the Apple menu, select About This Mac, and the RAM size is listed under Memory. Linux users can open a terminal and type free -h to see RAM in a human-readable format.

Key Takeaways

  • Windows: Settings > System > About shows your installed RAM in one line.
  • Right-clicking This PC and selecting Properties is the fastest alternative on Windows.
  • Mac users find RAM under Apple menu > About This Mac > Memory.
  • The number shown is your total RAM, not how much is currently in use.

What the RAM number means

The number you see is your total installed RAM, measured in gigabytes (GB). A PC might show 8 GB, 16 GB, 32 GB, or another amount. This is the maximum memory your system can use for running programs at the same time.

This total does not change unless you physically add or remove memory modules. It is not the same as how much RAM you are using right now — that number goes up and down as you open and close programs. The installed amount is fixed until you upgrade.

Using Task Manager to see RAM in real time

If you want to watch how much RAM your programs are actually using, open Task Manager by pressing Ctrl+Shift+Esc. Click the Performance tab, then select Memory from the left sidebar.

The top of the window shows your total RAM and how much is in use right now. The graph below tracks memory usage over time. This view is useful if a program is running slowly — you can see whether RAM is the bottleneck or whether something else is the problem.

You can also see which individual programs are using the most memory by clicking the Processes tab and sorting by the Memory column. This helps you identify which open programs are consuming the most resources.

Checking RAM through the command line

Windows users can also check RAM by opening Command Prompt or PowerShell and typing a single command. Press the Windows key, type cmd, and press Enter. Then type wmic logicaldisk get size or systeminfo and press Enter.

The systeminfo command shows a line labeled "Total Physical Memory" with your RAM amount in megabytes. This method is faster if you already have Command Prompt open, but the Settings method is simpler for most people.

Mac and Linux users can open Terminal and type free -h (Linux) or system_profiler SPHardwareDataType (Mac) to see RAM information. These commands are useful if you prefer working in the terminal or need to check RAM on a remote machine.

Why you might need to know your RAM amount

You need to know your RAM when you are deciding whether to upgrade your PC, checking if a new program will run on your system, or troubleshooting slowness. Many programs list a minimum RAM requirement — if your PC has less than that amount, the program may not run well or at all.

RAM also matters when you are buying a used PC or comparing two computers. A PC with 16 GB of RAM will handle multiple programs and browser tabs more smoothly than one with 8 GB. If you work with video editing, 3D design, or data analysis, you may need 32 GB or more.

Knowing your current RAM also helps you decide whether upgrading is worth the cost. If you have 8 GB and your programs are slow, adding 8 more GB may solve the problem. If you already have 32 GB and things are still slow, the issue is likely something else — your hard drive speed, your processor, or a specific program that is poorly written.

How to upgrade your RAM if you need more

If you find that your PC does not have enough RAM for what you do, you can add more. First, check what type of RAM your PC uses — this information is in the same Settings > System > About window, or you can search for your PC model online.

RAM comes in different speeds and types (DDR4, DDR5, and older versions). Your PC can only use the type it was built for. You can buy matching RAM modules from retailers like Amazon, Newegg, or Best Buy, or from your PC manufacturer.

Installation usually takes 10 to 20 minutes if you are comfortable opening your PC case. If you are not, a local computer repair shop can install it for you, usually for $20 to $50 in labor. Laptop RAM is harder to upgrade — some laptops have soldered RAM that cannot be removed at all, so check your model before buying.

Frequently Asked Questions

Is the RAM amount shown in Settings the same as what I can actually use?

Almost always yes. Windows reserves a small amount for system functions, so you might see 15.9 GB available when you have 16 GB installed. This is normal and not a problem. The difference is usually less than 0.5 GB.

Why does my PC show less RAM than I thought I had?

If you installed RAM yourself, one module may not be seated properly. Open your PC case, remove the RAM sticks, and push them firmly back in until the clips on both ends click. If one module is loose, your PC may only recognize the other one.

Can I check RAM on a PC that won't start?

If Windows will not boot, you cannot check RAM through Settings. You can open the PC case and count the RAM modules by hand, or take a photo and ask a repair shop to identify them. The modules are long, thin sticks in slots near the processor.

Does more RAM make my PC faster?

More RAM helps if you run many programs at once or work with large files. If you have enough RAM for what you do, adding more will not make things noticeably faster. Speed depends on your processor and hard drive too.

What is the difference between RAM and storage?

RAM is temporary memory that your PC uses while programs are running — it clears when you shut down. Storage (your hard drive or SSD) is permanent and holds your files, programs, and operating system. You need both, and they are not the same thing.