That board is over-engineered.

No idea what the discoloration at the right side is. It's unlikely to be due to use, as there is nothing there to get hot. The CAD files show that there is nothing there on the back.

The amazing this is the power supply modules - 3 on each board. These are high-end DC-DC converters which cost $50 each in wholesale quantities. With 15 viper boards per miner, that's $2250 for the DC-DC converters alone!

As one might have expected with being subbed out to a general engineering contractor - they've got a miner which is a workhorse, and is very expensive. Sadly, that isn't really what most miners want.

Looking at the size of the chips - I'd estimate that manufacturing cost of them is going to be about $25 each. At 180 chips per miner that's another $5k or so for the chips. (assumptions 250 mm2, 28nm, 50% yield)