You can use an external optical drive, I guess.
I don't think it's an Athlon, most likely going to be an APU+dGPU. Hopefully some decent memory, doesn't even have to be much (who seriously needs more than 4gb *today*).
Obviously, future-proofing would require 8gb, but I see no point in feeding a lot of ram to a mid-performance machine, which is going to be obsolete by the time it's using more than 4gb.