[gumby]

> Google claim 29x better performance-per-Watt with TPUs than contemporary GPUs[0]. Interesting to contrast that to the images-per-$ figure in this post, which is more like 2x.

But you aren't paying for the electricity, you're paying for processing, which is an unconnected parameter. They only "sell" these chips per use, not on the open market

Presuming power is a major cost input (which I assume) their profit/op is much higher. So they could sell for less than an equivalent GPU and make more money. But they think they can get away with value pricing it (processing more/unit time is presumably worth it to many customers) and more power to them.

(that last bit was not an intentional pun; only noticed after typing it)