With HP dishing out the £100 cash back on the micro and ml110 g7 servers currently I've been thinking about a couple of options. Currently I've got a pc running 12GB ram and an i3 540 at 3.91 with vsphere 5 hypervisor off my old corsair 550hx psu. The options considered are whether to get a new case and a lower capacity psu for this (to improve energy efficiency) and keep the existing hardware or to just replace it with one (or 2) of the above servers. Not had any performance issues so far with the hardware, just wanting to improve efficiency with leaving it on 24/7