Acoustics - Dell POWEREDGE R410 Technical Manualbook

PowerEdge R410 Technical Guidebook

6.5 Acoustics

The PowerEdge R410 has balanced acoustic and thermal performance. Thermal has to support a fully-
configured system with Intel 5500-EP 95 W processor. The acoustic goal is driving to meet Dell
Acoustic spec AC0142 Rev.A02 category II-D requirement.
This was accomplished by using an aluminum base passive heat sink with two embedded heat pipes
for the processor cooling and four 40x56mm dual-rotor fans exhausting air through heat sink and out of
the system. In SKU2 (RDN PSU SKU), there are two extra 40X56mm dual-rotor fans in the front of PDB
for redundant power supply cooling.
The 40x56mm dual-rotor fan has an external PWM speed control, and it's integrated into MB and PDB.
The thermal sensor on front control board senses the ambient temperature and adjusts the fan speed
accordingly. In a normal office environment, the fans spin slower, resulting in low acoustics. The fan
RPM begins to ramp up with ambient, CPU, IOH, and DIMM temperatures, CPU Temperature and
different system configuration (e.g. Different CPU and RAID card installation), to satisfy cooling
requirements at higher ambient temperatures.
Acoustic Metrics – The PowerEdge R410 Typical Configuration at 23C
Mode
Standby
Idle
Stress
Dell
Table 12. Standard Acoustic Spec
Table 13. R410 Actual Test Results
Loudness Tonality
(Sone) (tu)
0 0
3.0 0.23
3.0 0.24
Prominent Modulation
Ratio (%)
None 15%
None 33%
None 33%
LwAd
TBD
TBD
TBD
20