What makes Server Hardware server hardware?
What is it about a box that makes it a server? I'm not talking about the software here, just the nuts and bolts, ground-to-earth hardware side?
The reason for asking is that I salvaged an old Digital Signage Server from the recycling pile, couldn't get windows to fly (password protected) so I loaded a new Linux Mint14 on it (as a desktop machine) and now use it as a web server for my intranet. It runs very, very quietly and you get the impression it will run 24/7 for ever - unlike my windows desktop machine sat alongside.
Thing is, the school has got wind of something new and would like to try a windows webserver on another (new) machine and I'm wondering how to spec it. A server isn't just a desktop with server s/w which is left turned on 24/7 is it?