It does support ECC, but I don't understand its thermal design. Probably it's like NUCs, a small box for the sake of prettiness and a tiny-n-cheap fan that will be noisy.
It's a shame, because you can passively cool things like a i7-6700T these days without much effort and without ever falling into throttling [1]. Plus, Calyos is about to release a loop heat pipe that will be able to cool massive systems without any noise [2].
I wish someone like Apple or perhaps the new Microsoft had the vision to sell corporate desktops and workstations that did not suck noisewise. I imagine a little fanless Mac Mini running on Xeon would sell like hotcakes and would give Apple the chance to gain a further chunk of enterprise marketshare. But they don't seem to be interested.
[1] http://www.atlastsolutions.com/ultimate-fanless-mini-itx-pc-...