And, anyone else is like me and wants to see actual pictures or videos of the supercomputer, instead of a rendering like in venturebeat article? Well, head here, ORNL has a very short video: https://www.youtube.com/watch?v=etVzy1z_Ptg We can see among other things: that it's water-cooled (the blue and red tubing), at 0m3s we see a PCB labelled "Cray Inc Proprietary ... Sawtooth NIC Mezzanine Card"
Not much point submitting a dupe with the discussion already on the front page but you can email your better links to the mods who are looking for better a better link:
https://news.ycombinator.com/item?id=31571551