Service Manual

NOTE: Heat dissipation is calculated using the PSU wattage rating.
NOTE: This system is also designed to connect to the IT power systems with a phase-to-phase voltage not exceeding
240 V.
Cooling fans specifications
The Dell EMC XC740xd2 system supports up to six high performance cooling fans.
NOTE: When selecting or upgrading the system configuration, to ensure optimum power utilization, verify the system
power consumption with the Dell Energy Smart Solution Advisor available at Dell.com/ESSA.
Table 16. Dell EMC XC740xd2 fan support matrix
Storage PSU type Processor
count
Fan 1 Fan 2 Fan 3 Fan 4 Fan 5 Fan 6
24+2 x 3.5-
inch or 24 x
3.5-inch.
Redundant
PSUs only
1 Required Required Required Required Required Required
2 Required Required Required Required Required Required
NOTE: Each fan is listed in the systems management software, referenced by the respective fan number. If there is a
problem with a particular fan, you can easily identify and replace the proper fan by noting the fan numbers on the
cooling fan assembly.
System battery specifications
The Dell EMC XC740xd2 system supports CR 2032 3.0-V lithium coin cell system battery.
PCIe Expansion card riser specifications
The Dell EMC XC740xd2 system supports up to three PCI express (PCIe) generation 3 expansion cards that can be installed on the
system board and expansion card risers..
Table 17. Expansion card slots supported on the system board
Expansion card riser PCIe slots on the riser Processor
connection
Height Length Slot
width
Full height right riser Slot 2 Processor 1 Full Height Half Length x16
Low profile right riser Slot 2 Processor 1 Low Profile Half Length x16
Low profile left riser Slot 3 Processor 2 Low Profile Half Length x16
Butterfly riser Slot 2 Processor 1 Full Height Half Length x16
Butterfly riser Slot 3 Processor 1 Low Profile Half Length x8
NOTE: The expansion-card slots are not hot-swappable.
140 Technical specifications