Windows 10 RAM slots: Every computer, desktop or laptop, has a motherboard. This board determines what hardware can be installed on your computer. Think of it as a board that can connect multiple devices.
For example, if your computer's motherboard has only three locations, you can only connect three devices. On each motherboard, there are special places, that is, sockets for the different hardware you can connect.
The slots for RAM is another example. When you buy a computer, some or all of the RAM slots may be used. Below we will see how you can check if your computer has empty RAM slots without opening the box. Windows 10 should be installed, and we will see it from the Task Manager.
Open Task Manager and look at the Performance tab. Select "Memory" and below the memory graph, look for the Slots used field.
Here it shows how many of the available slots are available. In the figure below, the system has a total of 4 sockets and 2 is used.
Now that you know how many RAM sockets exist on your computer, you can decide if you want to add more RAM.
Normally, if you have an empty slot, it will be able to support as much RAM as is already in your system. For example, in the screenshot above, the system has 8GB (4 × 2) RAM and two empty slots. We could add another 4GBx2 RAM to this system.
One thing you need to pay attention to is the specification of the RAM you want to add. For example, if the RAM on your system is DDR3, do not install a DDR4 RAM with it. There will be performance problems or your system may not work at all.