Dell EMC PowerEdge C6420 User Manual

Mode-specic guidelines
Five memory channels are allocated to each processor. The allowable congurations depend on the memory mode selected. It is
recommended to set the memory to Memory Optimized mode.
NOTE: You can mix x4 and x8 DRAM based DIMMs to support RAS features. However, all guidelines for specic RAS features
must be followed. x4 DRAM based DIMMs retain Single Device Data Correction (SDDC) in memory optimized (independent
channel) mode. x8 DRAM based DIMMs need Advanced ECC mode to gain SDDC.
Removing a memory module
The procedure for removing a DIMM module and an NVDIMM-N module is identical.
Prerequisites
1 Follow the safety guidelines listed in Safety instructions.
2 Follow the procedure listed in Before working inside your system.
CAUTION: To prevent data loss and potential damage to your system, ensure that your system, LEDs on system, LEDs
on NVDIMM-N and LEDs on NVDIMM-N battery are turned o before removing the NVDIMM-N battery.
3 Remove the air shroud.
WARNING
: Allow the memory modules to cool after you power o the system. Handle the memory modules by the card edges
and avoid touching the components or metallic contacts on the memory module.
CAUTION: To ensure proper system cooling, memory module blanks must be installed in any memory socket that is not occupied.
Remove memory module blanks only if you intend to install memory modules in those sockets.
Steps
1 Locate the appropriate memory module socket.
CAUTION
: Handle each memory module only by the card edges, ensuring not to touch the middle of the memory
module or metallic contacts.
2 Push the ejectors outward on both ends of the memory module socket to release the memory module from the socket.
3 Lift and remove the memory module from the system.
Figure 21. Removing a memory module
Next steps
1 Install the memory module.
2 If you are removing the memory module permanently, install a memory module blank. The procedure to install a memory module blank
is similar to that of the memory module.
Installing and removing system components
73

Dell EMC PowerEdge C6420 Specifications

General

Processor	Intel Xeon Scalable processors
Management	iDRAC9
Max Processors	2 per node
Memory	DDR4
Storage	Up to 6 x 2.5" drives
Drive Bays	24 x 2.5" or 12 x 3.5"
Network	2 x 10GbE ports per sled
Power Supply	Dual, 2000W
Operating System Support	Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi
Maximum RAM	Up to 3TB per node
Max Memory	Up to 3TB per node