Dell OptiPlex 780 - Manual (Page 40)

DELL™ OPTIPLEX™ 780 TECHNICAL GUIDEBOOK V1.0
40
ACOUSTIC NOISE EMISSION INFORMATION
OPTIPLEX 780 USFF
The Declared Noise Emission in accordance with ISO 9296 for the Dell Optiplex 780 USFF 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 :
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
Operating Mode
Typical Configuration
Declared Sound Power (L
WAd
)
Idle 3.9
HDD Operating 3.9
90% CPU 4.4
ODD Operating 4.8
Component Typical Configuration
CPU E8500
Memory 2GB DDR3 1066 MHz (x1)
HDD (#, capacity) 160 GB 7200 RPM SATA2
RMSD DVDRW
Graphics Adapter Integrated