Summary
- HARTING supplies rack power cable assemblies within the NVIDIA MGX ecosystem.
- A 100A/480V AC whip is intended for the 110kW shelf; a separate 157A/800V DC design addresses a future architecture.
- No independent power-saving figures or commissioned 800V installation were disclosed.
HARTING has joined NVIDIA’s MGX infrastructure ecosystem as a supplier of rack power cable assemblies, not power converters, UPS systems or compute electronics. The German manufacturer describes a 100A/480V AC power whip for the Vera Rubin NVL72 3RU, 110kW power shelf and a next-generation 157A/800V DC connection design. The German industrial connectivity group announced the involvement on 12 October, identifying its power whip assemblies as the main area of contribution.
A power whip is the cable assembly carrying electrical supply from the building’s distribution equipment towards a rack. Its physical role is straightforward, but current rating, insulation, connector integrity, fault behaviour and maintainability become more demanding as rack power densities rise. Electrical interfaces must work within the rack architecture and the facility’s protection design rather than being assessed as isolated components.
The 480V assembly is associated with the NVIDIA Vera Rubin NVL72 power shelf; the 800V design addresses a later high-voltage architecture. Participation in an equipment ecosystem does not mean that a particular data centre has converted from AC to DC, nor does it establish that every proposed product is already being shipped at commercial scale.
Moving power efficiently into dense racks
Conventional facility electrical distribution involves successive stages of transformation, conversion and protection before power reaches IT equipment. Designers exploring higher-voltage DC architectures aim to reorganise some of those stages, potentially reducing current for a given power level and allowing different approaches to cabling and distribution.
At a fixed power level, raising distribution voltage reduces current, which can affect conductor sizes and resistive losses. That simple relationship does not establish the net efficiency of a complete 800V system. Rectification, conversion inside equipment, standby power, protection devices and cooling all have to be included in a full comparison.
Connectors and cable assemblies must also accommodate operating procedures. High-voltage DC has different interruption characteristics from AC because current does not naturally cross zero every half-cycle. Safe isolation, arc control, touch protection, testing and servicing therefore become central parts of engineering an 800V rack distribution system.
The announced technology work runs across two NVIDIA power generations, from 480V AC to the future 800V DC approach. Supporting both may help infrastructure manufacturers manage a phased transition, but deployment will depend on completed interface specifications, supplier qualification and customer decisions.
HARTING has not supplied an independently measured reduction in data centre electricity consumption attributable to the assemblies. Nor does the announcement specify orders, installed rack counts or live customer sites for the Vera Rubin configuration. It represents a component-level contribution to a larger platform programme.
At higher rack densities, mechanical compatibility matters as much as nominal electrical rating. Cable bend radius, connector location, strain relief and access for replacement can determine whether an assembly fits safely into the available rack space. Changes to the electrical architecture also alter how faults are detected and isolated, so a power whip has to be qualified with protective devices upstream and downstream. The ecosystem announcement does not substitute for those installation-specific checks or for a formal equipment acceptance process.
The specifications identify distinct cable assemblies rather than evidence of a site-wide move to 800V DC. HARTING has not disclosed third-party efficiency tests or commissioned facility installations for the announced connection designs.
