Atom boards are normally more than good enough for running a machine. If they have a parallel port they're usually good for Mach or LinuxCNC. Even without a parallel port, they're still good for running Mach with an external motion controller.

I've got one sat on the shelf loaded with windows 8 Pro for when I get around to the new control panel for my mill. I think I might upgrade it to Win10 before I use it though, as having bought a Win10 tablet, I'm finding Win10 far better to use than Win8.