[gus_massa]

4.5 hours × 2 "days", 100 Wats including support system.

I'm not sure how to implement the "no calculator" rule :) but for this kind of problems it's not critical.

Total = 900Wh = 3.24MJ

[qnleigh]

100 watts seems very low. A single Nvidia GeForce RTX 5090 is rated at ~600 watts. Probably they are using many GPUs/TPUs in parallel.

[gus_massa]

I forgot to explain in my comment, but my calculation is for humans.

If the computer uses ~600W, let's give it 45+45 minutes and we are even :) If they want to use many GPU ...