How to Check Maximum RAM Supported on Your PC

Do you want to know how much RAM your PC can take per slot?

Sometimes, along the way we need to upgrade the memory of our computer by adding more memory sticks.

But to avoid buying the wrong memory stick we need to check the model (e.g DDR3, DDR4, DDR5, …), the frequency, and most importantly the maximum size supported by the motherboard.

In this tutorial, we will see how much RAM our system has and how much GBs can we add per slot. Yes you read that right, there is a maximum size per slot per model of motherboard.

Let’s dive in!

Check Maximum Size of Memory Sticks on Windows 10

To know how much RAM your system has, just press WIN+Pause.

Read the information next to “Installed memory (RAM):“.

If you want to see the slots available and the size of RAM per memory stick head to the Task Manager.

You can open the Task Manager from the Taskbar or by pressing Ctrl+Shift+Esc.

Head to the “Performance” tab and check “Memory“.

You will find the Speed and Slots used.

How to Know Maximum RAM We Can Use

Now it’s time to know how much GBs per stick of RAM we can use in our Windows 10 system, this information is related to the motherboard manufacturer if you want to use more RAM than this limit you need to change the motherboard.

First, open the Command Prompt from the Start menu, you can use regular command prompt but I have the habit of using it as administrator.

Type in this command:

wmic memphysical get MaxCapacity, MemoryDevices

I got this output:

  • MaxCapacity MemoryDevices
    67108864    4

Here’s the calculation you will need to do to find the maximum GBs per RAM stick (per slot):

67108864 / 1048576 = 64 / 4 = 16GB

I converted the amount in KB to GB by the first division, then I divided by the number of slots in total to get the maximum amount of GB per slot.

There you have it dear friend ;)

If you have any questions about RAM please leave a comment below!

Thank you for sharing.

The author:

Soufiane is a young computer scientist and specialist in web design, knows a lot of things in the computer world. This enthusiast enjoys helping people innovate and learn more about the IT world...

  • vishnumoorthi says:

    i got 32 gb as maximum capacity of my ram slot since i had only 2 slots and i got the same results above metioned in the website but slots were 2 so i divided by 2 and got 32gb but i got install only 4gb ram pls can u make ie understand further more pls

  • Tlou says:

    I got 12gb as my maximum and I was wondering what the maximum per stick might be as there is no 6gb of ram?

  • Cecilia Lee says:

    I’m trying to get motherboard’s RAM maximum capacity before adding or changing memory card. I followed instructions above and got this result:
    MaxCapacity = 0
    MemoryDevices = 2

    Please help.


  • Sebastian Pizarro says:

    Thanks for your help! It helps me a lot.

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