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Standard operating temperature
Table 28. Standard operating temperature specifications
Standard operating temperature
Continuous operation (for altitude less than 950 m or 3117
ft)
Expanded operating temperature
Table 29. Expanded operating temperature specifications
Expanded operating temperature
Continuous operation
≤ 1% of annual operating hours
NOTE:
When operating in the expanded temperature range, system performance may be impacted.
NOTE:
When operating in the expanded temperature range, ambient temperature warnings may be reported in the System Event
Log.
Expanded operating temperature restrictions
•
Do not perform a cold startup below 5°C.
•
The operating temperature specified is for a maximum altitude of 3050 m (10,000 ft).
•
150 W/8 core, 165 W/12 core and higher wattage processor [Thermal Design Power (TDP)>165 W] are not supported.
•
Redundant power supply unit is required.
•
Non-Dell qualified peripheral cards and/or peripheral cards greater than 25 W are not supported.
•
PCIe SSD is not supported.
•
NVDIMM-Ns are not supported.
•
GPU is not supported.
•
Tape backup unit is not supported.
34
Dell EMC PowerEdge R740 Installation and Service Manual
Technical specifications
Specifications
10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment.
Specifications
5°C to 40°C at 5% to 85% RH with 29°C dew point.
NOTE:
Outside the standard operating temperature (10°C to
35°C), the system can operate continuously in temperatures as low
as 5°C and as high as 40°C.
For temperatures between 35°C to 40°C, de-rate maximum allowable
temperature by 1°C per 175 m above 950 m (1°F per 319 ft).
–5°C to 45°C at 5% to 90% RH with 29°C dew point.
NOTE:
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
temperature by 1°C per 125 m above 950 m (1°F per 228 ft).
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