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For a less rural example, I am finding different numbers, but all of New York City is estimated at somewhere between 5-10GW. So, some 9 million people vs one data center.

Some significant fraction of that NY number will already be data center.

There's a little evidence that project is real, it looks a lot more like a pie in the sky dream.

3GW per what? Hour? Year? Minute?

Watt is Joule/second

3 gigajoule per second. It already has a unit of time.

3GW/9GW is peak load, as I understand it - data centres usually operate at 85-90% of peak load according to Goldman Sachs.

Meanwhile, the 4GW figure is average demand - Utah consumed 35,075GWh for 2025, so average demand of 4GW (35075/(365*24)).

3GWh/h.