As the artificial intelligence industry enters a phase of rapid development, high energy consumption brought by high computing power has become a core characteristic of next-generation data centers. Traditional power supply architectures can hardly cope with the explosive growth in computing power demand.
In early 2026, ByteDance adopted the 800V High-Voltage Direct Current (HVDC) power supply architecture in its data center construction bidding, marking a landmark initiative by Chinese internet enterprises in technological innovation for data center power supply. The deployment of 800V HVDC helps improve power supply efficiency and reliability and fuels profound transformations in global data center power supply systems. At present, tech firms, operators and industrial chain manufacturers worldwide have started to develop 800V DC power supply technologies, and a power revolution centered on computing infrastructure is gaining momentum.
Computing Power Demand Spurs Technological Innovation
Electricity undergoes multi-level conversion before powering data centers: high-voltage alternating current from the public grid is stepped down into low-voltage alternating current via transformers, converted into direct current by rectifiers, and finally subjected to secondary voltage reduction by internal server power modules to energize core components including CPUs, storage and network equipment. Substantial electric energy is lost as heat during repeated AC-DC conversion. Meanwhile, conversion equipment incurs heavy hardware costs, occupies considerable space and creates mounting operation and maintenance pressure, forming the primary obstacle to improving data center energy efficiency.
In terms of application scenarios, conventional data centers mainly support basic businesses such as corporate IT systems, internet services and general data storage. Equipped with CPU-based general-purpose servers, they feature a single rack power rating of merely 5–15 kW and relatively low computing density and energy consumption, which can be satisfied by traditional power supply architectures. Nevertheless, the widespread adoption of artificial intelligence has triggered fundamental shifts in the configuration and requirements of data centers. AI data centers focus on large model training, deep learning inference, intelligent computing and other workloads, with high-performance chips as core computing carriers. The power consumption of a single rack has soared from dozens of kilowatts to hundreds of kilowatts, even reaching the megawatt level, resulting in exponential growth in equipment power draw. Meanwhile, AI hardware generates drastically increased heat dissipation demand, cooling systems account for a rising proportion of total energy consumption, and higher standards are imposed on the stability and power capacity of power supply systems.
Against this industry backdrop, the 800V HVDC power supply architecture has emerged. Compared with traditional power supply modes, the 800V HVDC system reduces power conversion steps, enables efficient direct electric power transmission, and cuts conversion losses at the source. Data from industrial developer Enteligent indicates that traditional AC systems achieve an end-to-end conversion efficiency of 78%. By simplifying power paths, the 800V HVDC system delivers an efficiency of 94%–95%.
This technology is now advancing toward industrial implementation. Besides ByteDance, global operators and ecosystem players including Meta, Google, NVIDIA and ABB are accelerating relevant deployment, pushing HVDC power supply from conceptual research to practical application. In October 2025, ABB announced a partnership with NVIDIA to support the 800V DC architecture for NVIDIA’s 1 MW server racks.
The rollout of this technology relies on joint support from the global industrial chain. Under high-voltage DC power supply architectures, power modules need enhanced voltage withstand capability, faster response speed, higher conversion efficiency and improved protection mechanisms — such as fault isolation and hot-swap designs tailored for high-voltage DC. Suppliers including Infineon and STMicroelectronics are developing relevant high-efficiency components to guarantee stable operation under the 800V DC architecture.
Industry Consensus Accelerates Standardization
The iterative upgrade of data center power supply technologies is driven by industrial standardization efforts. Among relevant initiatives, the Open Compute Project (OCP) stands as a core force promoting industry standardization. Founded by Meta in 2011, the OCP is an open hardware organization dedicated to the openness and standardization of data center hardware architectures. It has formulated a series of industrial specifications covering power supply, cooling, rack interfaces and other infrastructure areas, serving as key guidance for the development of global computing infrastructure.
In recent years, the OCP has identified HVDC power supply as a core development direction for future data center power infrastructure. At the OCP Global Summit in October 2025, the OCP released a timeline for the industry’s transition to the 800V HVDC architecture. According to the roadmap:
In the short term (2025–2026), the industry will still rely mainly on traditional side-mounted power supply architectures with AC input and 50V DC output;
In the medium term (2026–2027), high-power-density racks will widely adopt three-phase PSUs (power supply units with three-phase AC input) and liquid cooling systems, enabling compatibility between 50V DC and HVDC power supply;
In the long term (2027–2028), infrastructure-level HVDC architectures will become mainstream. High-voltage DC buses will be deployed directly at racks, and solid-state transformer technology will realize efficient power conversion.
By establishing unified standards, standardizing power supply interfaces and ensuring equipment interoperability, the OCP breaks down corporate technical barriers and lays an industrial foundation for large-scale deployment of 800V HVDC power supply.
The adoption of the 800V DC power supply architecture represents more than a shift in power supply modes; it accelerates the restructuring of technologies and product portfolios across the entire power supply industrial chain. The popularization of this technology will drive technological innovation throughout the whole supply chain, covering magnetic core materials, high-voltage cables, power management ICs and power protection components. It will also push industrial players to increase R&D investment and upgrade their product lines.