Technical Product Specification

Power Sub-system Intel® Server Chassis SC5650 TPS
Revision 1.2
Intel order number E39531-004
32
2.2.1.2 Acoustic and Fan Speed Control Requirements
Sound power levels emitted by the power supply meet the requirements shown in the following
table. Sound power is measured as described in ISO7779. Under a condition where inlet air
temperature exceeds the limit, sound power level may exceed the limit.
The power supply incorporates a variable speed fan. The fan speed varies linearly based on
output loading and ambient temperature. The declared sound power levels (LwAd) of the power
supply unit (PSU) meet the requirements shown in the following table. Sound power is
measured according to ECMA 74 (www.ecma-international.org) and reported according to ISO
9296.
The acoustic measurement of the power supply is performed with the power supply fan
operating at the RPM corresponding to the operating conditions shown in the following table.
The PSU acoustic test report should include at a minimum the following information: power
supply dimensions, picture, fan model and size, fan voltage (or duty cycle), and RPM and PSU
sound power level at each operating condition. The proper RPM thermally sustainable is
determined through PSU thermal testing and should be submitted as an appendix to the
acoustic test report.
The cage should be tested in a 1+0 non-redundant configuration and a 1+1 redundant
configuration.
Table 25. Acoustic Requirements
Operating Conditions Inlet Temperature
Condition
% of Single module
Maximum Loading
Condition
LwAd (BA)
Maximum (1+0 & 1+1) 45ºC 100% < 6.5
Operating (1+0 & 1+1)
40°C
60% < 5.2
Idle (1+0 & 1+1)
35°C
40% < 4.0
2.2.1.3 Temperature Requirements
The power supply operates within all specified limits over the T
op
temperature range described
in the following table. The average air temperature difference (ΔT
ps
) from the inlet to the outlet of
the power supply does not exceed 20 degrees C. All airflow passes through the power supply
and not over the exterior surfaces of the power supply.
Table 26. Thermal Requirements
Item Description MIN Max Units
T
op
Operating temperature range 0 45
°C
T
non-op
Non-operating temperature range -40 70
°C
Altitude Maximum operating altitude 1524
(5,000)
m
(ft)