Highly Efficient

Efficient

Average

Inefficient

Highly Inefficient

There is still room to improve and save energy. Although difficult to improve the PUE, it is possible to save energy. Try to replace IT equipments by more energy efficient products, automate processes of loading / unloading servers. Make sure equipments are being used at high load levels.

Very close to an "highly efficient" level. Improvements by implementing a DCIM and replacing AC system, Free-cooling, high performance UPSs.
With no impact on PUE but an energy saving strategy: Try to replace IT equipments by more energy efficient products, automate processes of loading / unloading servers. Make sure equipments are being used at high load levels.

Relatively easy to save energy. Check the air-flow and use Containment if not already. Implement a DCIM and replacing AC system, Free-cooling, high performance UPSs.

Easy to save energy. Containment will boost savings. Improving the air-flow will allow turning off some CRAC systems or reduce their use. Check if possible to use Free-cooling, confirm the UPSs are operating at acceptable loading levels.

There are plenty of ways to save energy. Containment is key to big savings. Make sure the air-flow inside the cabinets is controlled by covering all unused "U" space, close openings on top, bottom, left and right: cooled air should pass through IT equipment. Improving the air-flow will allow turning off some CRAC systems or reduce their use. Check if possible to use Free-cooling, confirm the UPSs are operating at acceptable loading levels.