I was working with a client recently and as part of a consolidation project using VMware we were transferring machines from one rack to another and removing redundant equipment. Whilst doing this we removed an ultra small form factor PC from Dell from one of the cabinets. It was a surprise however we we extricated the ultra small pc and then found that it had no internal power supply rather an external psu. Finally extracting the PSU we both laughed when we looked at the proportions of the PSU to the PC. I have to say I don’t remember a psu just as large for such a small PC. So a little picture to illustrate