Siemens and Reinhausen turn up the voltage for hungry AI racks
- ID
- 14988
- Status
- summarized
- Published
- 18 Aug 2026, 2:30 AM
- Fetched
- 18 Aug 2026, 5:13 AM
- Provider
- The Register
- Category
- technology
- Original URL
- https://www.theregister.com/on-prem/2026/08/17/siemens-and-reinhausen-turn-up-the-voltage-for-hungry-ai-racks/5288565
- Source URL
- https://www.theregister.com/headlines.atom
Summary
- Score
- 3.5
- Created
- 18 Aug 2026, 5:16 AM
- Tags
- Audience
- developersvibe_coderssaas_founders
What happened
Siemens and Reinhausen are jointly developing a modular solid-state transformer (SST) that converts medium-voltage AC (up to 36 kV) directly into 800 VDC for high-density AI datacenter racks, reducing intermediate conversion stages. No commercial availability date was given. Nvidia separately plans its own 800 VDC power rack for the second half of 2026, citing that racks drawing 1 MW or more will require this shift.
Why it matters
This is early-stage hardware development with no ship date, so no action is needed now. The practical signal is that 800 VDC is becoming the industry standard for next-gen AI rack power — relevant only if you are planning datacenter capacity or evaluating colocation for GPU-heavy workloads in the next 2-3 years. For most builders running on cloud, this is background context, not a decision point.
Discussion angle
Whether 800 VDC rack power and megawatt-scale densities will trickle down to Southeast Asian colocation providers, or whether regional builders will continue relying on hyperscaler cloud capacity rather than owning GPU infrastructure.