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Green rectangular DDR4 memory module with gold contacts and black chips, no heat spreader

NEMIX RAM

NEMIX RAM 64GB DDR4 2933 ECC RDIMM 2Rx4 CL21 1.2V 288-Pin Dell PowerEdge R840

SKU CH-BJRR-GSNQB

64 GB DDR4 2933 ECC registered DIMM with CL21 latency for Dell PowerEdge R840 servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 64GB capacity supports demanding server workloads
  • DDR4 2933MHz speed enables high-throughput data processing
  • ECC registered design protects data integrity in critical applications
  • 2V operation reduces power consumption per module
  • Validated for Dell PowerEdge R840 rack servers

Dell PowerEdge R840 Compatibility

This 64GB DDR4 module is built for the Dell PowerEdge R840 rack server. It uses registered ECC technology to maintain data integrity in mission-critical workloads. The single 64GB stick fits one 288-pin slot and runs at 1.2V.

Sustained Load Behaviour

Modules are stress tested under load to verify stability during continuous operation. ECC circuitry corrects single-bit errors in real time without halting the system. Registered buffering reduces electrical load on the memory controller during extended sessions.

2Rx4 Rank Configuration

The dual-rank 2Rx4 organisation determines how the memory controller addresses the chips. This rank layout must match the platform's qualified vendor list for the R840 to initialise correctly. Systems requiring a different rank structure will not support this module.

How it compares

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

Price $385.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.03 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR4 2933 MHz RDIMM Registered Server Memory
Part numberMR23400-924K1
Total capacity64 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 rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items64 GB (1 × 64 GB) DDR4 2933 MHz PC4-23400 2Rx4 1.2 V CL21 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How much heat or power does a 64GB DDR4 2933 ECC RDIMM draw when the Dell PowerEdge R840 runs all day?

The module operates at 1.2V with no heat spreader, so it relies on server airflow for cooling during continuous operation.

What must the Dell PowerEdge R840 already have for this 288-pin DDR4 RDIMM to work?

The R840 needs free 288-pin DDR4 slots and a BIOS that supports 2Rx4 registered ECC modules at 2933 MT/s.

Will this 64GB DDR4 2933 CL21 ECC RDIMM run alongside older DDR4 sticks already in the R840?

Yes, if the existing modules are also registered ECC DDR4; the system will clock all sticks to the slowest speed and loosest timings.

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