Dell PowerEdge M820 Technical Manual page 42

Maximum shock
Operating One shock pulse in the positive z axis (one pulse on each side of the system) of 31G for up
to 2.6ms
Storage Six consecutively executed shock pulses in the positive and negative x, y, and z axes (one
pulse on each side of the system) of 71G for up to 2ms
Altitude
Operating –15.2m to 3048m (–50 ft to 10,000 ft)
Storage –15.2m to 12,000m (–50 ft to 39,370 ft)
Airborne contaminant level
Class G1 or lower as defined by ISA-S71.04-1985
USB peripherals are supported through the front USB ports. They are USB 2.0 compliant.
PowerEdge M820 Technical Guide
42