2x CMK16GX4M2B3000C15W (4x8GB) on B450 Aorus

Nov 8, 2018
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I have the B450 motherboard that has the following RAM QVL list:http://download.gigabyte.us/FileList/Memory/mb_memory_b450-aorus-pro-wifi-raven.pdf

I ordered the following RAM that can be found in the list: CMK16GX4M2B3000C15W

This 2x8 GB RAM. My question is, can I buy another two and expand my memory total. The QVL list has a Memory socket support check box for 1,2 and 4 sockets but I am not sure if this is in respect to the sockets required by each RAM or if this is the max sockets that I ram can occupy and no more can be added for whatever reason.
 
I assume that eventually I would want to have 32GB for games as games get more intense. Is 16GB currently enough?