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Fresh 2026 guide
PUE, energy costs and colocation: how to read a data center bill
Energy has become a core infrastructure parameter. In colocation, look beyond rack units: power, cooling, redundancy, metering and growth path matter just as much.
Short answer
Energy has become a core infrastructure parameter. In colocation, look beyond rack units: power, cooling, redundancy, metering and growth path matter just as much.
What PUE means
PUE compares total facility energy with IT energy. It is not the only metric, but it helps evaluate power and cooling efficiency.
Power instead of rack units alone
Two 1U servers can use very different power. Colocation design should include real draw, peak load and expected growth.
Cooling and density
More disks, CPUs, NICs or GPUs means more heat. Rack placement must consider airflow, redundant power and service access.
The cost of predictability
A professional data center turns local power and cooling risk into a monitored service with procedures, access and support.
Practical checklist
- Check nameplate values and real power draw under load.
- Calculate peak load, PSU redundancy and expected 12-24 month growth.
- Document cooling needs: airflow direction, disk density, GPU and service access.
- Compare energy cost with the risk cost of local power or cooling failure.
- Choose the colocation variant and monitor usage after launch.
Frequently asked questions
Does PUE describe the whole data center quality?
No. PUE describes energy efficiency, but redundancy, procedures, monitoring, access, network and security also matter.
Is a 1U server always cheap in colocation?
No. Cost depends on space, power draw, cooling, transfer, support and additional services.
Why is power so important in planning?
It drives cooling, redundancy, growth path and real infrastructure cost.