Specifications

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
49
ACOUSTIC NOISE EMISSION INFORMATION
OPTIPLEX 990 SFF
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
The Declared Noise Emission in accordance with ISO 9296 for the Dell OptiPlex 990 SFF 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
3.6 3.9
HDD Operating
3.6 4.0
90% CPU
3.9 4.3
ODD Operating
4.6 4.6
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 25.3 21.6 19.6 18.6 29.4 25.8 22.1 21.4
HDD Operating 24.7 20.5 20.6 19.9 29.3 25.4 22.7 20.6
90% CPU 28.9 24.2 21.0 21.0 32.9 28.1 27.5 26.5
ODD Operating 36.9 30.6 29.5 27.7 38.0 32.4 33.2 29.6
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