You are going to have to see if you can put more RAM into it. Shouldn't be too much of an issue. Also there is no mention of a GPU that I noticed, but since it looks to be fairly small form factor you might not be able to put one in, plus I doubt the PSU can support a whole lot.
The CPU is actually a pretty decent CPU even to today's standards. The new chips have a lot more features, but these older ones actually still perform quite well.
As far as gaming goes, you likely aren't going to be able to do a whole lot since it's likely just using intel graphics.
Good buy as far a price though.
Gotta figure out how to set these up lol.