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2: The Basics of Green IT 35

■ Adopt power distribution at 208 volts or 230 volts for servers:
Using high-voltage power cords such as 208 volts or 230 volts instead of
standard 120-volt power distribution can push server power efficiency
from 82 percent to 84 percent or 85 percent. All you have to do is make
sure, when deploying your servers and deploying your power distribution
into your racks, to use the high-voltage power distribution capability and
the capability the servers actually have. Keep the voltage as high as possi-
ble while feeding to the server.

Resources to Get the Latest Information on Green IT

In the age of the Internet. many Web sites provide the latest informa-
tion on green IT. The following list of some of the author’s favorites pro-
vides a segue to Chapter 3 on the need for collaboration for green IT.
Chapter 3 provides additional information on the role of several of the
organizations given in the list (for example, The Green Grid, ASHRAE,
The Uptime Institute, and so on): ptg

■ The Green Grid—Industry Group Focused on Data Center Energy
Efficiency
http://www.thegreengrid.org/home
The Green Grid, founded in 2007, has a mission to further data cen-
ter energy-efficiency initiatives. The Green Grid consists of IT
equipment and component manufacturers, manufacturers of facility
support equipment, and data center operators and designers.
■ ASHRAE—American Society of Heating, Refrigerating, and Air
Conditioning Engineers
http://www.ashrae.org/
The ASHRAE engineering society was established in 1894 and has
always been involved in the design of efficient plumbing to heat
and cool buildings and data centers. It is one of the “Grand-Daddy”
engineering groups involved in energy efficiency for data centers.
The group publishes a set of documents and manuals that provide
cooling strategies for data centers. My association with ASHRAE
goes back to the mid-seventies, when I regularly attended ASHRAE
conferences and also presented papers on energy conservation during
the energy crisis of the late 1970s.