It has onboard graphics. Have you not looked the board up at all?
This would make for a pretty awful portable, any cheap laptop from the last 7 or 8 years would be better. Not to mention needing VGA adapters.
This thing is intended for small jobs that don't require a lot of processing and to be extremely efficient, thus the Atom cores. Given the number of SATA ports, probably was designed as some form of inexpensive network storage.
All of those things require an OS to be installed. Even if that OS only has one job. FreeNAS is an OS. PFSense or something like it is an OS.
Windows will run on it, not entirely sure which Windows, but with 2012 on the list that would include Vista and Windows 7 certainly. Probably 8 as well. 8.1 and 10 I know start creeping into needing up to date instruction sets, which I mentioned before. Those Atom cores might make the cut though. Would have to track down the white papers on the CPU and the OS in question.
Linux can be made very light, but it is still an 8 core, even if they aren't going to be that fast, so I would think even full blown OS will run relatively well. Certainly better than the typical Atom based processor. But applications that rely on single core speed are not going to be impressive.
Depends on what you want to do with it. If you need Windows, be aware that most high end applications will run pretty slow. But word processing and other basic tasks will be fine. Games are pretty much out of the question unless we are talking pretty simple titles.
With its lack of video capabilities I would be hard pressed to find a use for it. I have an Atom stick computer from a few years back. It can just about manage Youtube at 720p and my old DOS games. My brother uses an identical one to stream live TV. But that one was designed for consumer use. This Avoton processor is for running something for probably years at a time, and it looks like the graphics are coming from the motherboard so not really sure how to judge that performance.
Appears to be some sort of ARM based management processor with included 2D graphics. Might not even be capable of typical graphics capabilities you are used to.