RE: Data Centre news9 Dec 2025 10:30
Data Centre energy demands on Nvidia Blackwell GPUs taken from https://x.com/kakashiii111?s=20
This is where he is questioning the amount of chips sold - "Jensen said 6 million Blackwell GPUs have shipped."
"Let's assume I am bad at even rough and simple math and that the 6 million shipped Blackwell GPUs are correctly calculated in the numbers.
So we have 6 million Blackwell GPUs shipped since January 2025. Roughly 65 to 70 percent of these GPUs go to datacenters in the US.
To power 65 to 70 percent of that 6 million GPU fleet (roughly 3.9 to 4.2 million GPUs), you would need approximately 8.5 to 11 gigawatts (GW) of datacenter capacity.
(FYI, This amount of power is roughly equivalent to the total electricity generation capacity of Singapore or about ten standard nuclear reactors.)
Between 2024 and 2025, the US has built 3.8 to 4.2 GW in 2024 and an estimated 4.5 to 5.0 GW in 2025, which is 8.5 GW combined (Let's ignore that due to power delays, only about half of that is physically delivered within the calendar year).
So we have at best 8.5 GW, which is the rough minimum needed to power all the Blackwell chips in the US. The math is matching only if we assume that datacenters with Nvidia chips are the only ones being built in the US (excluding AMD, TPUs, and any other datacenters without Nvidia) and that only Blackwell has been installed in datacenters built in 2024, and that they were waiting for Blackwell chips in 2025 to operate.
Now some energy data:
According to the Federal Energy Regulatory Commission (FERC), the US installed nearly 26 GW of new generation capacity between January and August 2025, slightly up from the approximately 23 GW installed over the same period last year.
From the 26 GW, 3 GW are wind, 3.7 GW natural gas, and 20 GW solar, and 0 GW nuclear.
I will believe Jensen, because in this post we are just believing Jensen’s words that in the next 6 to 7 years we are going to see a bunch of small nuclear reactors and that we will all be power generators, just like somebody’s farm. So I will assume he means starting from January 2026, because so far there were deployed 0 GW of nuclear in the US in 2025.
So it means that if all datacenters that have been built, deployed, and planned to finish by the end of this year are truly completed on time, then by numbers only (simple math, I do not know the actual allocation) all natural gas built this year has been allocated to datacenter consumption, including about 80 percent of wind or around 25 percent of all solar energy."