Owners Manual
Table Of Contents
- Dell EMC PowerEdge R940xa Installation and Service Manual
- About this document
- PowerEdge R940xa system overview
- Initial system setup and configuration
- Installing and removing system components
- Safety instructions
- Before working inside your system
- After working inside your system
- Recommended tools
- Front bezel
- Drives
- System cover
- Support bar
- Cooling fans
- Cooling fan assembly
- Optional USB 3.0 module
- Optional optical drive
- Control panel
- Air shroud
- NVDIMM-N battery
- Drive backplane
- System memory
- Processors and heat sinks
- Expansion cards and expansion card risers
- Expansion card installation guidelines
- Removing the expansion card riser
- Installing the expansion card riser
- Removing the expansion card from the riser
- Installing the expansion card in the riser
- Removing the expansion card from the system board
- Installing the expansion card on the system board
- GPU card installation guidelines
- Removing the GPU
- Installing the GPU
- M.2 SSD module
- Optional IDSDM or vFlash module
- Network daughter card
- System battery
- Optional internal USB memory key
- Power supply units
- Power interposer board
- Trusted Platform Module
- System board
- Jumpers and connectors
- System diagnostics and indicator codes
- Getting help
- Documentation resources
● Supported configurations have dual processors and a minimum of 12x RDIMMs.
● Maximum of 12 NVDIMM-Ns can be installed on each system.
● NVDIMM-Ns or RDIMMs must not be mixed with LRDIMMs.
● DDR4 NVDIMM-Ns must be populated only on the black release tabs on processor 1 and 2.
● For systems with four processors, RDIMMs populated on processor 3 and 4 must be identical to the number of RDIMMs
populated on processor 1 and 2.
● All slots on configurations 3, 6, 9, and 12 can be used, but a maximum of 12 NVDIMM-Ns can be installed in a system.
NOTE: NVDIMM-N memory slots are not hot-pluggable.
For more information about the supported NVDIMM-N configurations, see the NVDIMM-N User Guide at www.dell.com/
poweredgemanuals.
Table 6. Supported NVDIMM-N for dual processor configurations
Configuration Description Memory population rules
RDIMMs NVDIMM-N
Configuration 1 12x 16 GB RDIMMs, 1x
NVDIMM-N
Processor1 {A1, 2, 3, 4, 5, 6}
Processor2 {B1, 2, 3, 4, 5, 6}
Processor1 {A7}
Configuration 2 12x 32 GB RDIMMs, 1x
NVDIMM-N
Same for all 12x
RDIMM configurations. See
Configuration 1.
Processor1 {A7}
Configuration 3 23x 32 GB RDIMMs, 1x
NVDIMM-N
Processor1 {A1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12}
Processor2 {B1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11}
Processor2 {B12}
Configuration 4 12x 16 GB RDIMMs, 2x
NVDIMM-Ns
Same for all 12x
RDIMM configurations. See
Configuration 1.
Processor1 {A7}
Processor2 {B7}
Configuration 5 12x 32 GB RDIMMs, 2x
NVDIMM-Ns
Same for all 12x RDIMM
configurations. See
Configuration 1.
Processor1 {A7}
Processor2 {B7}
Configuration 6 22x 32 GB RDIMMs, 2x
NVDIMM-Ns
Processor1 {A1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11}
Processor2 {B1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11}
Processor1 {A12}
Processor2 {B12}
Configuration 7 12x 16 GB RDIMMs, 4x
NVDIMM-Ns
Same for all 12x
RDIMM configurations. See
Configuration 1.
Processor1 {A7, A8}
Processor2 {B7, B8}
Configuration 8 22x 32 GB RDIMMs, 4x
NVDIMM-Ns
Same for all 12x
RDIMM configurations. See
Configuration 1.
Processor1 {A7, A8}
Processor2 {B7, B8}
Configuration 9 20x 32 GB RDIMMs, 4x
NVDIMM-Ns
Processor1 {A1, 2, 3, 4, 5, 6, 7,
8, 9, 10}
Processor2 {B1, 2, 3, 4, 5, 6,
7, 8, 9, 10}
Processor1 {A11, 12}
Processor2 {B11, 12}
Configuration 10 12x 16 GB RDIMMs, 6x
NVDIMM-Ns
Same for all 12x
RDIMM configurations. See
Configuration 1.
Processor1 {A7, 8, 9}
Processor2 {B7, 8, 9}
Installing and removing system components 71