Dell OptiPlex 990 Technical Guide - Page 49

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK -V 1.0 ACOUSTIC NOISE EMISSION INFORMATION OPTIPLEX 990 USFF Component Typical Configuration CPU Intel l3,3.3GHZ,2c SNB 65W Memory 1G DDR3 1333MHz HDD (#, capacity) RMSD Graphics Adapter 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 990 USFF 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 3.7 4.3 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 Idle HDD Operating 90% CPU ODD Operating Typical Configuration Declared Sound Pressure (LpA) Table-Top Floor-Standing Operator Position (LpA) Bystander Position (LpA) Operator Position (LpA) Bystander 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 49