I've just got a machine up and running Zimbra at home I originally just did this to for learning purposes but I have decided to keep it running permanently as I like it so much. Unfortunately the PC it is on is a thirsty beast.
Any suggestions for a machine thats wont brake the bank on electricity costs that can be left on 24/7.

Its only going to be used by max 15 users so it wont need the processing power of deep blue