Quick take

  • As you look to shortlist colocation providers, PUE should be a factor. But take care, as things aren’t always as they seem.
  • Differences in PUE from one data center to another will significantly impact your clients’ costs and scalability.
  • Learn more about how PUE matters for your clients in our new white paper.

As your clients continue to expect more from you as a trusted advisor, it is increasingly essential to understand all the factors that differentiate one colocation provider from another – “location, location, location” and beyond. PUE is one of those factors, and it’s in the news again as the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) recently released a new energy efficiency design standard specifically for data centers.

Power Usage Effectiveness (PUE) is the ratio of all energy consumed by the data center to the energy actually consumed by the IT equipment. It tells you how much energy IT is using and how much goes to data center overhead.

Calculating PUE

But there are two types of PUE that matter: peak PUE and annualized PUE.

The new ASHRAE standard, 90.4, is roughly equivalent to peak PUE, a measure of data center efficiency under peak load conditions. By itself, peak PUE doesn’t provide a complete picture of a data center’s energy efficiency, because it doesn’t account for operational efficiency. That’s still annualized PUE, a standard put forth by The Green Grid to measure operational efficiency.

In an environment in which energy efficiency is increasingly important to corporate real estate and facilities leaders, understanding the two PUE metrics and being able to assess PUE between data centers is an essential pre-requisite to delivering value-added consultative service to your clients.

In the white paper, you’ll learn:

  • The difference between annualized PUE and peak PUE, and why it matters. (Annualized PUE impacts operational costs; peak PUE affects capital costs and your ability to scale up IT load within a data center.)
  • The technology behind our industry-leading 1.15 annualized PUE, which yields a 32% savings over a high-end data center.
  • 8 PUE questions to ask when comparing colocation providers.