Dell Vostro 260 Owner's Manual page 48

Power
NOTE: Heat dissipation is calculated by using the power supply wattage rating.
Physical
Vostro 260:
Height
Width
Depth
Weight (Minimum)
Vostro 260S:
Height
Width
Depth
Weight (Minimum)
Environmental
Temperature:
Operating
Storage
Relative humidity
Altitude:
Operating
Storage
Airborne contaminant level
48
360.00 mm (14.17 inches)
175.00 mm (6.89 inches)
436.30 mm (17.18 inches)
8.20 Kg (18.08 lb)
360.00 mm (14.17 inches)
102.00 mm (4.02 inches)
433.10 mm (17.05 inches)
7.60 Kg (16.76 lb)
10 °C to 35 °C (50 °F to 95 °F)
–40 °C to 65 °C (–40 °F to 149 °F)
20 % to 80 % (noncondensing)
–15.20 m to 3048 m (–50 ft to 10,000 ft)
–15.20 m to 10,668 m (–50 ft to 35,000 ft)
G1 as defined by ISA-S71.04–1985