At least by http://www.quora.com/How-do-I-run-Mac-OS-X-on-a-non-Apple-co... and http://www.quora.com/Is-it-illegal-to-install-OS-X-on-non-Ap... it is technically possible (though unstable) to run OS X on non-Apple hardware, but illegal. No mention that it is legal to run the server version of OS X on non-mac hardware.