Find your mac mini can install maximum ram

I bought a mac mini late 2009 and I want to make a private server in my home. Because it had been 10 years from it’s release, so it need a hardware upgrade. Use this website you can find the maximum size of your mac mini can install. https://everymac.com/actual-maximum-mac-ram/actual-maximum-mac-mini-ram-capacity.html

This is the short screen: