Environmental Specifications - Dell PowerEdge R820 Technical Manual

Table 29 details the environmental specifications for the R820. For the most up-to-date information,
Dell PowerEdge R820 Systems Owner's Manual
see the
Started Guide
on Support.Dell.com/Manuals. For additional information about environmental
measurements for specific system configurations, see www.dell.com/environmental_datasheets.
Temperature
Continuous 10°C to 35°C at 10% to 80% relative humidity (RH), with 26°C max dew point. De-rate
operation maximum allowable dry bulb temperature at 1°C per 300m above 900m (1°F per 550 ft).
When operating in the expanded temperature range, system performance may be
Expanded
impacted. When operating in the expanded temperature range, ambient temperature
operation
warnings may be reported on the LCD and in the System Event Log.
≤ 10% of annual operating hours: 5°C to 40°C at 5% to 85% RH with 26°C dew point.
Outside the standard operating temperature (10°C to 35°C), the system can operate down
to 5°C or up to 40°C for a maximum of 10% of its annual operating hours. For
temperatures between 35°C and 40°C, de-rate maximum allowable dry bulb temperature
by 1°C per 175m above 950m (1°F per 319 ft).
≤ 1% of annual operating hours: –5°C to 45°C at 5% to 90% RH with 26°C dew point.
Outside the standard operating temperature (10°C to 35°C), the system can operate down
to –5°C or up to 45°C for a maximum of 1% of its annual operating hours. For
temperatures between 40°C and 45°C, de-rate maximum allowable dry bulb temperature
by 1°C per 125m above 950m (1 °F per 22 ft).
Expanded operation restrictions:

Maximum 95W processors (two or four processors)

LRDIMMs not supported

Express Flash drives not supported

GPU not supported

Maximum 8 hard drives (no dual PERC)

x8 backplane only (restrict 2nd x8, x16 or x4 backplanes)

Requires two redundant power supplies, either 750W or 1100W

PCIe slot 1 and slot 2 cannot be populated
o
Storage –40 C to 65
47 PowerEdge R820 Technical Guide
o o o
C (-40 F to 149 F) with a maximum temperature gradation of 20
Dell PowerEdge R820 Getting
and the
o
C per hour