IBM System x3755 M3 7164 Installation And User Manual page 23

2. Power consumption and heat output vary depending on the number and type of
optional features that are installed and the power-management optional features
that are in use.
3. The sound levels were measured in controlled acoustical environments
according to the procedures specified by ISO 7779 and are reported in
accordance with ISO 9296. Actual sound-pressure levels in a given location
might exceed the average values stated because of room reflections and other
nearby noise sources. The declared sound-power levels indicate an upper limit,
below which a large number of computers will operate.
Chapter 1. The System x3755 M3 server
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