Dell OptiPlex 790 Technical Guidebook - Page 47

DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - V 1.6 ACOUSTIC NOISE EMISSION INFORMATION OPTIPLEX 790 USFF Component CPU Memory HDD (#, capacity) RMSD Graphics Adapter Typical Configuration Intel l3,3.3GHZ,2c SNB 65W 1G DDR3 1333MHz 250G 7200RPM SATA2 8X 12.7 SATA DVDRW Intel® HD Graphics Family The Declared Noise Emission in accordance with ISO 9296 for the Dell Optiplex 780 USFF is as follows: (all values LWAd expressed in bels; 1 bel=10 decibels, re 10-12 Watts) Operating Mode Idle Typical Configuration Declared Sound Power (LWAd) 3.7 HDD Operating 3.7 90% CPU 4.3 ODD Operating 4.7 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 Typical Configuration Declared Sound Pressure (LpA) Table-Top Floor-Standing Idle HDD Operating 90% CPU ODD Operating Operator Position (LpA) Bystander Position (LpA) Operator Position (LpA) Bystande r Position (LpA) 29.8 27.5 22.3 21.6 30.8 29.2 21.9 21.5 36.3 34.9 26.4 25.0 39.3 34.7 31.6 29.3 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