A high-density rack PDU is essential for data centres running AI, HPC and GPU servers. In this article, we explain what to look for when selecting a PDU for high-density racks.
Power density in modern data centres is increasing rapidly. With the rise of AI workloads, GPU-based servers and HPC environments, power consumption per rack has grown significantly. Where traditional racks typically operated at 5–10 kW, power levels of 20 kW, 30 kW or more are now becoming standard.
This shift places new demands on power distribution within the rack. A standard PDU is often no longer sufficient. In this article, we explain what a high density rack PDU is, what to look for, and how to select the right solution for modern IT environments.
A high density rack PDU is designed to support racks with high power loads and a large number of connected devices.
Key characteristics include:
Unlike standard PDUs, the focus is on scalability, resilience and precise energy measurement.
If you are looking for general information about PDUs, please read our complete guide here: Everything about PDUs. For frequently asked questions, please refer to our PDU FAQ.
The growth of AI and HPC is directly impacting rack design:
This makes accurate power distribution and monitoring critical.
AI infrastructure creates entirely different power challenges compared to traditional enterprise IT environments.
Modern GPU clusters often operate with:
As AI adoption accelerates, many data centres are facing limitations in:
High density rack PDUs help operators manage these challenges by providing:
This becomes especially important in AI factories, HPC clusters and edge AI deployments where operational continuity is critical.
High density racks typically require:
This enables:
More equipment means:
Combi outlets (such as C13/C15/C19/C21) provide flexibility for different types of equipment.
Visibility is essential in modern data centres:
This supports:
Physical access to high density racks is often limited.
Remote switching enables:
Technologies such as bi-stable relays and near zero voltage switching enhance reliability and lifespan.
A modern PDU must integrate seamlessly into existing infrastructure:
Real-time data is essential for monitoring and automation.
In high-density environments, real-time visibility can significantly improve operational decision-making.
Power usage in AI clusters can change rapidly depending on:
Real-time monitoring allows operators to:
Modern intelligent PDUs increasingly function as active infrastructure management devices rather than passive power strips.
AI and HPC environments have specific requirements:
A suitable PDU must:
Different terms are often used interchangeably in the market:
In practice, users typically search for:
Key selection criteria include:
Energy efficiency is becoming a major consideration in modern data centre design.
As rack power densities increase, operators require more detailed insight into:
Intelligent rack PDUs support sustainability initiatives by enabling:
Combined with DCEM and monitoring platforms, this data can support:
For AI and HPC environments, detailed energy visibility is increasingly essential for controlling operational costs and improving infrastructure efficiency.
The shift towards high density racks requires a different approach to power distribution. A suitable rack PDU must not only provide sufficient capacity, but also deliver visibility, control and integration.
For AI, HPC and modern data centre environments, a high density rack PDU is no longer optional, but essential.
High density racks typically operate above 15–20 kW per rack. AI and HPC environments may exceed 30 kW, 60 kW or more depending on GPU configuration and workload requirements.
A high density rack PDU is specifically designed for higher power loads, increased outlet density, advanced monitoring and remote management capabilities.
Outlet-level monitoring provides detailed insight into individual device consumption, enabling better capacity planning, energy optimisation and overload prevention.
AI environments increasingly require intelligent PDUs due to higher rack densities, power fluctuations and the need for real-time infrastructure visibility.
Schleifenbauer introduces groundbreaking packaging-free PDUs, designed for direct installation in server racks without unnecessary packaging. This solution is ideal for data centres aiming for maximum efficiency and minimal environmental impact.
Designed around project requirements! When a customer needs a PDU, a few parameters are always crucial: the required current (amperes), the number of phases, the level of intelligence, the number of outlets, and the type of circuit protection. These specifications are determined during the quotation process – based on the tender text, the customer’s requirements, […]
Request a Quote