You can get to that quite easily with a decently specced PC sporting a couple of high-end Nvidia GPUs in SLi.

You were expecting Nvidia chips to suddenly chew less power 'cos they were stuck on a maths copro board rather than a graphics card why exactly?

Flames, 'cos I'll bet it's like Satan's fireplace inside the box too.

From TFA "it's not surprising". What surprised me were the ratings on switches - e.g. the power consumption of a high end 48 port Catalyst is in the same ballpark.