Dell OptiPlex 990 Technical Guide - Page 47

Typical Configuration Declared Sound Pressure - no sound

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DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK -V 1.0 ACOUSTIC NOISE EMISSION INFORMATION OPTIPLEX 990 DT Component CPU Memory HDD (#, capacity) RMSD Graphics Adapter Typical Configuration Intel l3,3.3GHZ,2c SNB 65W 2G DDR3 1333MHz 250G 7200RPM SATA2 16X DVD+/-RW SATA HH Intel® HD Graphics Family High-end Configuration Intel I5,3.1GHZ ,4c SNB 95W 2G DDR3 1333MHz(x2) 500G 7200RPM SATA2 16X DVD+/-RW SATA HH ATI Radeon HD 6350 The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 990 DT is as follows: (all values LWAd expressed in bels; 1 bel=10 decibels, re 10-12 Watts) Operating Mode Idle HDD Operating 90% CPU ODD Operating Typical Configuration Declared Sound Power (LWAd) 3.7 3.6 4.1 5.1 High-end Configuration Declared Sound Power (LWAd) 3.7 3.8 4.4 5.1 The Declared A-weighted Sound Pressure Level in decibels (re 2x10-5 Pa), at Operator, Bystander, and Desk Side Positions are measured in accordance with ISO 7779 7.6.1, 7.6.2, and C.15.2 and declared in accordance with ISO 9296 for this product is as follows1: Operating Mode Idle HDD Operating 90% CPU ODD Operating Typical Configuration Declared Sound Pressure (LpA) Table-Top Floor-Standing High-end Configuration Declared Sound Pressure (LpA) Table-Top Floor- Standing Operator Position (LpA) Bystander Position (LpA) Operator Position (LpA) Bystander Position (LpA) Operator Position (LpA) Bystander Position (LpA) Operator Position (LpA) Bystander Position (LpA) 24.6 20.7 20.5 19.5 24.9 22.5 21.0 20.9 24.9 21.2 20.7 19.8 24.2 21.8 21.0 20.9 29.4 24.1 20.8 21.3 33.4 30.7 27.1 26.2 42.2 36.8 35.1 34.7 41.2 37.2 35.5 33.5 1 All tests are conducted according to ISO 7779 and declared according to ISO 9296 except 90% CPU. For this mode, the system CPU was stressed at 90% utilization with no other peripheral device actively seeking. This test mode is not specified in ISO 7779, but was measured using the same microphone distances and measurement techniques defined for the other reported operating modes. 2 Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2 47

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DELL™ OPTIPLEX™ 990
TECHNICAL GUIDEBOOK
—
V 1.0
47
ACOUSTIC NOISE EMISSION INFORMATION
OPTIPLEX 990 DT
1
All tests are conducted according to ISO 7779 and declared according to ISO 9296 except 90% CPU.
For this mode, the system CPU was
stressed at 90% utilization with no other peripheral device actively seeking.
This test mode is not specified in ISO 7779, but was measured using
the same microphone distances and measurement techniques defined for the other reported operating modes.
2
Declared Sound Power rounded to nearest tenth of a bel per ISO 9296 section 4.4.2
Component
Typical Configuration
High-end Configuration
CPU
Intel l3,3.3GHZ,2c SNB 65W
Intel I5,3.1GHZ ,4c SNB 95W
Memory
2G DDR3 1333MHz
2G DDR3 1333MHz(x2)
HDD (#, capacity)
250G 7200RPM SATA2
500G 7200RPM SATA2
RMSD
16X DVD+/-RW SATA HH
16X DVD+/-RW SATA HH
Graphics Adapter
Intel® HD Graphics Family
ATI Radeon HD 6350
The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 990 DT is as follows:
(all values L
WAd
expressed in bels; 1 bel=10 decibels, re 10
-12
Watts)
The Declared A-weighted Sound Pressure Level in decibels (re 2x10
-5
Pa), at Operator, Bystander, and Desk Side Positions are
measured in accordance with ISO 7779 7.6.1, 7.6.2, and C.15.2 and declared in accordance with ISO 9296 for this product is as
follows
1
:
Operating Mode
Typical Configuration
Declared Sound Power (L
WAd
)
High-end Configuration
Declared Sound Power (L
WAd
)
Idle
3.7
3.7
HDD Operating
3.6
3.8
90% CPU
4.1
4.4
ODD Operating
5.1
5.1
Operating Mode
Typical Configuration Declared Sound Pressure
(LpA)
High-end Configuration Declared Sound Pressure
(LpA)
Table-Top
Floor-Standing
Table-Top
Floor- Standing
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
Bystander
Position
(LpA)
Operator
Position
(LpA)
Bystander
Position
(LpA)
Idle
24.6
20.7
20.5
19.5
24.9
22.5
21.0
20.9
HDD Operating
24.9
21.2
20.7
19.8
24.2
21.8
21.0
20.9
90% CPU
29.4
24.1
20.8
21.3
33.4
30.7
27.1
26.2
ODD Operating
42.2
36.8
35.1
34.7
41.2
37.2
35.5
33.5