Intel NUC DE3815TYKE, Atom E3815, for about 50€ shipped. It's got a DDR3 ram slot and can host 8GB ram, along with a sata port and a slot for a 2.5" disk. It a

Intel NUC DE3815TYKE, Atom E3815, for about 50€ shipped. It's got a DDR3 ram slot and can host 8GB ram, along with a sata port and a slot for a 2.5" disk. It also has 4GB of on-board storage that I really don't care about. The processor is a single-core atom that clocks at about 1.4GHz with a TDP of about 5W. I don't really care much about speed for this machine because it will become a home vpn gateway running PFSense. The CPU has AES-NI instruction, and that's what convinced me to get it. My current vpn gateway is a Dell Optiplex FX160 which is still an atom and performs okay-ish, but has got no AES-NI and no internal storage beyond a dumb 2GB disk-on-module, on which pfsense barely fits and consumes about ~17 Watts powered on.