Intel® Server Chassis SR1475 / Intel® Server System SR1475NH1-E
Revision 1.0
- 52 -
6.2 Airflow
Requirements
The power supply shall incorporate two 40mm fans for self-cooling and system cooling. The
fans will provide no less than 8 CFM airflow through the power supply when installed in the
system. The cooling air will enter the power supply module from the non-AC side.
System Flow Impedance - 1U
0.0
0.1
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0
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Power Supply Airflow (CFM)
S
y
s
tem
P
res
su
re
(
in
H
2
O)
Figure 38. Airflow Characteristics
6.3 Acoustics
The power supply shall incorporate two variable speed fans. The fans speed shall vary linearly
based on output loading and ambient temperature. The declared sound power levels (LwAd) of
the power supply unit (PSU) must meet the requirements shown in the following table. Sound
power must be measured according to ECMA 74 (
www.ecma-international.org
) and reported
according to ISO 9296.
The acoustic measurement of the PSU shall be performed with the PSU fan operating at the
RPM corresponding to the operating conditions shown in the following table. The PSU acoustic
test report shall include the PSU dimension, photo, fan model and size, fan voltage (or duty
cycle), RPM and PSU sound power level at each operating condition. The proper RPM
thermally sustainable shall be determined through PSU thermal testing, and shall be submitted
as an appendix to the acoustic test report.
The declared sound power level of the power supply module shall not exceed the levels
specified in the following table.
Summary of Contents for SR1475
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