Dell PowerEdge M915 Technical Guide - Page 22

Acoustics

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Dell 5.6 Acoustics Table 4 shows the acoustical performance for a typical configuration of the M1000e chassis with four PowerEdge M915 blade servers installed. Acoustical performance varies with hardware configurations. Table 4. Acoustical Performance of M1000e Chassis with Four M915 Blades Installed Typical Configuration (per blade) @ 23±2°C Ambient in M1000e Chassis Processors Hard Drives DIMMs Mezzanine Cards Operating Mode LwA-UL (bels) 4 x AMD 2 x 2.5‖ 6174 SAS (15K) 8 x 8GB 4 (115W) 146GB Standby 7.1 Idle 8.4 Processor Active 8.4 Definitions Standby: AC Power is connected to power supplies but the system is not turned on. Idle: Reference ISO7779 (1999) definition 3.1.7; system is running in its OS but no other specific activity. Processor Active: An operating mode per ISO7779 (1999) definition 3.1.6; a program is run to simulate utilization of processor in general applications. LwA-UL: The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO 9296 (1988) and measured in accordance to ISO 7779 (1999). PowerEdge M915 Technical Guide 22

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Dell
PowerEdge M915 Technical Guide
22
5.6
Acoustics
Table 4 shows the acoustical performance for a typical configuration of the M1000e chassis with four
PowerEdge M915 blade servers installed. Acoustical performance varies with hardware
configurations.
Acoustical Performance of M1000e Chassis with Four M915 Blades Installed
Table 4.
Typical Configuration (per blade) @ 23±2°C
Ambient in M1000e Chassis
Operating
Mode
LwA-UL
(bels)
Processors
Hard
Drives
DIMMs
Mezzanine
Cards
4 x AMD
6174
(115W)
2 x 2.5‖
SAS (15K)
146GB
8 x 8GB
4
Standby
7.1
Idle
8.4
Processor
Active
8.4
Definitions
Standby:
AC Power is connected to power supplies but the system is not turned on.
Idle:
Reference ISO7779 (1999) definition 3.1.7; system is running in its OS but no other specific
activity.
Processor Active:
An operating mode per ISO7779 (1999) definition 3.1.6; a program is run to
simulate utilization of processor in general applications.
LwA
–
UL:
The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO 9296 (1988) and
measured in accordance to ISO 7779 (1999).