[FastFT]

Core voltage is going to be in the ballpark of 1V, and given the stated power consumption is 15kw that means a minimum of 15kA. So, it is indeed a lot but the math checks out.

[bgnn]

7nm core voltage is 0.75V. If they want good reliability, 0.7V underdrive is understandable. So, 2.2kA at 0.7V sounds reasonable to me.

[vpribish]

how much of that power actually reaches the chip though? (it's hilarious that this is one chip)? this thing is mostly a water pump - I just can't - everything about it is just wild

[Kirby64]

Most of it. The water pump and other stuff consumes probably less than 500W total. There's some efficiency loss in the actual power converters, but they're likely designed to be >95% efficient (probably >98%), otherwise cooling them would be a nightmare.