Acoustic Noise Emission Information - Dell OPTIPLEX 990 Technical Manualbook

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.4
AC OU STI C NOI SE EMI SS I O N I N FOR MA TIO N
OPTIPLEX 990 MT
Component
CPU
Memory
HDD (#, capacity)
RMSD
Graphics Adapter
The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 990 MT is as follows:
(all values L expressed in bels; 1 bel=10 decibels, re 10
WAd
Operating Mode
Idle
HDD Operating
90% CPU
ODD Operating
The Declared A-weighted Sound Pressure Level in decibels (re 2x10
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
1
follows :
Typical Configuration Declared Sound Pressure
Operating Mode
Operator
Position
Idle
HDD Operating
90% CPU
ODD Operating
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
Typical Configuration
Intel i3,3.3GHZ,2c SNB 65W
2G DDR3 1333MHz
250G 7200RPM SATA2
16X DVD+/-RW SATA HH
Intel® HD Graphics Family
Typical Configuration
Declared Sound Power (L
3.9
3.8
(LpA)
Table-Top
Bystander Operator
Position Position
(LpA) (LpA)
26.5 24.2
26.7 24.9
26.7 24.8
39.7 35.8
Intel i5,3.1GHZ ,4c SNB 95W
500G 7200RPM SATA2(x2)
16X DVD+/-RW SATA HH
-12
Watts)
) Declared Sound Power (L
WAd
3.7
5.1
-5
Pa), at Operator, Bystander, and Desk Side Positions are
Floor-Standing
Bystander
Position
(LpA) (LpA)
21.0 21.2
21.1 20.9
21.6 21.3
36.6 36.1
High-end Configuration
2G DDR3 1333MHz(x2)
ATI Radeon HD 6350
High-end Configuration
)
WAd
3.9
3.9
4.0
5.1
High-end Configuration Declared Sound Pressure
(LpA)
Table-Top
Operator Bystander
Position Position
(LpA) (LpA)
26.8 24.3
26.8 23.9
30.0 26.3
40.7 36.0
Floor- Standing
Operator Bystander
Position Position
(LpA) (LpA)
20.9 21.4
21.8 21.4
22.4 22.0
35.4 33.5
47