by Howard Miller.
This question gets asked several times a week. The actual answer is "it depends". It depends on what software you will use (e.g. Linux tends to be less hardware hungry than Windows) how you configure your server, how you tune your server, your level of skill and experience and exactly how you use Moodle on the server.
The only sensible answer is to try it, monitor it, and see what happens. This gives you the answer for *you* but not for everybody.
See