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.
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Hi Sebastian,
I would like to know how we can distinguish the maximum speed that I can use for my HP 15s-eq100 series.
Great post
Hello,
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
Regards,
Hello,
I got 12gb as my maximum and I was wondering what the maximum per stick might be as there is no 6gb of ram?
Regards,
Your system supporting a maximum of 12gb means that you can find any compatible 8gb RAM module along with a compatible 4gb RAM module. Since your pc allows up to 12gb that means the maximum for a single stick would be 8gb, but if you have one 8gb stick you cannot use another, as the device would not support it.
Hello,
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.
Regards,
Cecilia
Hello,
It means the size installable for the particular memory array is unknown.
Source:
https://superuser.com/a/1217045
Thanks for your help! It helps me a lot.
Hi Sebastian,
Glad it helped you, thanks for leaving a comment and welcome on Easytutorial.com
Hello,
How to check these in Win 7. If i try the command u shared its sayin No instances found
Regards,
Hello,
first click windows+r then something will popup then type cdm and click ok and you are ready to go
Hi,
How to know the max RAM speed supported by the motherboard?
Thanks.
Hello,
My acer travelmate 4750 shows 32 GB capacity with 4 memory devices. I can see only 2 memory slots however. Ideally if I say that the 2 slots have not been exposed still I can say that its 8GB per slot.
However many sites are saying the maximum RAM capacity per slot for Acer Travelmate 4750 is 4GB.
Can you please advise ?