If you use the Crucial.com website for purchasing memory. There’s a very helpful scanner that can identify your computer and tell you how much memory you currently have as well as the maximum installed memory your system is capable of.
The scanner downloads and runs using the browser. If you have Windows 10, you’ll need to use the Internet Explorer browser to download and run the scanner.
If you attempt to download and run the scanner using the Edge browser, it won’t run properly.
Iowa City Technology Services 
It worked fine on firefox