Reference Guide
Table Of Contents
- Dell EMC PowerEdge R940 Technical Specifications
- PowerEdge R940 technical specifications
- System dimensions
- System weight
- Cooling fan specifications
- Processor specifications
- Supported operating systems
- PSU specifications
- System battery specifications
- Expansion bus specifications
- Memory specifications
- Storage controller specifications
- Remote management port specifications
- Drive specifications
- Ports and connectors specifications
- Video specifications
- Environmental specifications
Processor specifications
The PowerEdge R940 system supports two or four Intel Xeon Scalable Processors, up to 28 cores per socket.
Supported operating systems
The table below lists the primary operating systems supported on the PowerEdge R940:
● Red Hat® Enterprise Linux
● SUSE® Linux Enterprise Server
● Microsoft Windows Server® with Hyper-V
● VMware ESXi
● Canonical® Ubuntu® LTS
NOTE: For more information about the specific versions and additions, see https://www.dell.com/ossupport.
PSU specifications
The PowerEdge R940 system supports up to two AC or DC power supply units (PSUs):
● Two 2400 W, 2000 W, 1600 W, or 1100 W AC power supply units (PSUs)
● Two 1100 W DC PSUs
● Two 1100 W Mixed Mode HVDC PSUs
NOTE: The PowerEdge R940 system supports hot swappable PSUs.
CAUTION: If two PSUs are installed, both the PSUs must have the same type of label. For example, Extended
Power Performance (EPP) label. Mixing PSUs from previous generations of PowerEdge servers is not
supported, even if the PSUs have the same power rating. This results in a PSU mismatch condition or failure to
turn the system on.
NOTE: Titanium PSU is nominally rated for 200 V AC to 240 V AC input only.
NOTE: When two identical PSUs are installed, power supply redundancy (1+1 – with redundancy or 2+0 – without
redundancy) is configured in system BIOS. In redundant mode, power is supplied to the system equally from both PSUs
when Hot Spare is disabled. When Hot Spare is enabled, one of the PSUs is put into the sleep mode when system utilization
is low in order to maximize efficiency.
NOTE: If two PSUs are used, they must be of the same maximum output power.
Table 3. PSU specifications
PSU Class Heat dissipation
(maximum)
Frequency Voltage Power rating Current
1100 W AC Platinum 4100 BTU/hr 50/60 Hz 100–120 V AC,
autoranging
derated to 1050 W 12 A–6.5
A
200–240 V AC,
autoranging
1100 W
1100 W DC N/A 4416 BTU/hr N/A –(48–60) V DC,
autoranging
1100 W 32 A
1100 W Mixed
Mode HVDC
(for China
and Japan
only)
Platinum 4100 BTU/hr 50/60 Hz 100–120 V AC,
autoranging
derated to 1050 W 12 A–6.5
A
N/A 4100 BTU/hr N/A 200–380 V DC,
autoranging
1100 W 6.4 A–
3.2 A
6 PowerEdge R940 technical specifications