One megawatt, from the edge of the site to a single die
Medium-voltage AC arrives at the fence. One conversion later it is 800 V DC, and it stays DC until the tray.
NVIDIA · May 2025 · NVIDIA · August 2026
Medium-voltage AC in, 800 V DC out, in a single step
Solid-state transformers at the perimeter turn it straight into 800 V DC, so the racks no longer need AC power supplies.
NVIDIA · May 2025 · NVIDIA · August 2026
Power electronics where the line-frequency transformer used to be
In a typical design each phase is shared across a string of power cells. Every cell rectifies its slice, passes it through a small high-frequency transformer, and hands it to one 800 V DC bus.
NVIDIA · May 2025 · Layout illustrative
Why SSTs switch on silicon carbide →Wolfspeed · March 2026
One backbone for racks from 100 kW to beyond 1 MW
The busway runs above every row. Racks can grow without the hall being rebuilt.
NVIDIA · May 2025 · NVIDIA · August 2026
800 V drops from the busway into a sidecar beside the rack
At GTC 2025 NVIDIA showed an 800 V sidecar powering 576 Rubin Ultra GPUs in one Kyber rack.
NVIDIA · May 2025
576 Rubin Ultra GPUs in a single rack
800 V enters on two conductors and a protective earth, and stays 800 V until it reaches the compute tray.
NVIDIA · May 2025 · NVIDIA · October 2025
800 V comes all the way to the tray
The big step down happens on the tray itself, next to the GPUs it feeds.
NVIDIA · October 2025 · Layout illustrative
800 V to 12 V in one step, in 26% less area
One resonant stage goes from 800 V to 12 V, where today's racks use a power supply and a second converter.
NVIDIA · October 2025
12 V becomes core voltage right beside the package
A ring of voltage regulators makes the final conversion. From here the current is enormous, so the path is millimetres long.
NVIDIA · May 2025 · Layout illustrative
One of 576 GPUs, at the end of a single DC chain
Grid, one conversion, a busway, one more conversion on the tray, and the regulators. That is the whole path.
NVIDIA · May 2025 · NVIDIA · October 2025
Every watt on that die left the grid as 13.8 kV AC
Up to 5% more of it arrives, with 45% less copper on the way.
NVIDIA · May 2025
An independent illustration of NVIDIA's published 800 VDC design. Layouts marked illustrative are not NVIDIA's. Not affiliated with NVIDIA.
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