Reference Guide

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 on the bezel's
LCD panel and 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).
● Low core count processors [Gold 6240Y, 6146, 6144] and higher wattage processors [Thermal Design Power (TDP)>=165 W]
are not supported.
● Non-Dell qualified peripheral cards and/or peripheral cards greater than 30 W are not supported.
● PCIe SSD is not supported.
● NVDIMM is not supported.
● DCPMM is not supported.
Thermal
PowerEdge servers have an extensive collection of sensors that automatically track thermal activity, which helps regulate
temperature thereby reducing server noise and power consumption. The sensors in the MX840c interact with the chassis
management services module which regulates fan speed. All fans which cool the MX840c are contained in the MX7000 chassis.
Thermal management of PowerEdge MX840c delivers high performance for the right amount of cooling to components at the
lowest fan speeds across a wide range of ambient temperatures from 10°C to 35°C (50°F to 95°F) and to extended ambient
temperature ranges (see Environmental Specifications). The benefits to you are lower fan power consumption (lower server
system power and data center power consumption) and greater acoustical versatility.
Table 21. Thermal restrictions matrix
Ambient support 25°C 30°C 35°C 40°C-45°C Expanded
operating temperature
Processor No restriction No restriction No restriction No support for 165 W
processors and above.
No support for Gold
6144(150W8c)
6146(165W12c)
6240Y(150W8c)
DIMM No restriction No restriction No restriction No support for NVDIMM
Drive No restriction No restriction No restriction No support for NVMe drive
Card No restriction No restriction No restriction No support for card power
above 30 W
20 Technical specifications