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Green rectangular DDR4 RDIMM module with black chips and gold edge contacts

NEMIX RAM

NEMIX RAM 16GB DDR4 2933 PC4-23400 2Rx8 CL21 1.2V 288-Pin ECC RDIMM Dell PowerEdge R940 memory upgrade

SKU CH-R42P-0671K

Adds 16 GB of 2933 MHz DDR4 ECC registered memory to a Dell PowerEdge R940 server

  • Total capacity16 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 16 GB DDR4 2933 MHz adds responsive capacity for Dell PowerEdge R940
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • CL21 latency at 1.2 V balances speed with low power draw
  • 288-pin 2Rx8 RDIMM fits the server memory slots without adapters
  • Built with Samsung, Micron or Hynix chips for enterprise-grade reliability

Dell PowerEdge R940 ECC RDIMM

This 16 GB DDR4 module is built for the Dell PowerEdge R940 server. It carries ECC and registered operation to protect data integrity in enterprise workloads. The single-stick design lets administrators add capacity one slot at a time.

Tool-free DIMM installation

The 288-pin RDIMM seats in the standard DDR4 server slots without extra brackets or cables. Alignment keys prevent backwards insertion, and the low-profile form clears most CPU coolers. Common issues arise when mixing ranks or speeds across channels, so match the existing CL21 2933 MT/s specification.

Registered ECC at 2933 MT/s

The registered buffer and on-die ECC are the decisive spec for R940 compatibility; unbuffered or non-ECC modules will not post. This stick delivers PC4-23400 bandwidth at 1.2 V with a 2Rx8 organisation. Buyers needing non-ECC or higher-frequency memory should look elsewhere.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $108.99
Cheaper than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.81 per GB
Cheaper than about 58% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR4 2933 MHz RDIMM Registered Server Memory
Part numberMR23400-628K1
Total capacity16 GB
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items16 GB (1 × 16 GB) DDR4 2933 MHz PC4-23400 2Rx8 1.2 V CL21 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How do I confirm the module is running at DDR4 2933 PC4-23400 with ECC active after installing it in the PowerEdge R940?

Enter the system BIOS or iDRAC interface after boot; the memory configuration screen will show each DIMM running at 2933 MT/s, PC4-23400 data rate, CL21 latency, 1.2 V, and ECC status as enabled for the registered 2Rx8 module.

What comes in the package and what must be sourced separately for the Dell PowerEdge R940 upgrade?

The box contains one 16 GB 288-pin DDR4 RDIMM (part MR23400-628K1); no heat spreader, tools, cables or additional DIMMs are included, so any extra modules or server rail kits must be purchased separately.

Which capacity and rank configuration should I choose for the R940 when the options include this 16 GB 2Rx8 registered ECC RDIMM?

Select this 16 GB 2Rx8 CL21 1.2 V module when you need a single registered ECC DIMM to populate an empty slot or match existing 2Rx8 sticks; the 288-pin DDR4 2933 specification ensures compatibility with the R940 memory architecture.

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