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Sixteen green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 1TB (16×64GB) DDR5 4800 CL40 2Rx4 1.1V 288-Pin ECC RDIMM Dell R660XS server RAM

SKU CH-25EZ-ACH4T

16-module DDR5 ECC registered RDIMM kit delivering 1 TB at 4800 MT/s CL40 1.1 V for Dell PowerEdge R660XS servers

  • Total capacity1 TB (16 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1TB total capacity from sixteen 64GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered RDIMM for data integrity
  • 1V operation reduces power draw
  • Validated for Dell PowerEdge R660XS servers

Dell PowerEdge R660XS memory kit

This 1 TB kit contains sixteen 64 GB DDR5 4800 CL40 registered ECC RDIMMs built for the Dell PowerEdge R660XS. It targets IT teams who need maximum registered capacity in that specific server platform.

Registered ECC modules with 2Rx4 organisation

Each module runs at 1.1 V and uses a 288-pin DDR5 RDIMM form factor with 2Rx4 rank configuration. The registered buffer and on-die ECC protect data integrity under sustained enterprise workloads.

Verify 16-slot capacity and DDR5 RDIMM support

Confirm the R660XS chassis provides sixteen DDR5 RDIMM slots and that the BIOS recognises 64 GB 2Rx4 modules at 4800 MT/s. This kit will not fit systems limited to UDIMM or earlier DDR generations.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $28,453.99
Pricier than about 94% of the 6,523 comparable items (median $188.99).
Total capacity 1 TB (16 × 64 GB)
Higher than about 92% of the 6,064 comparable items (median 32 GB).
Price per GB $28.45 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Series Server Memory
Model nameDell Compatible DDR5 ECC Registered RDIMM
Part numberMR38400-924K16
Total capacity1 TB (16 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V

Questions about this item

Will the 16 registered DIMMs need replacement if the server runs continuously?

Registered DDR5 ECC modules have no moving parts and no heat spreader, so they are not scheduled for periodic replacement; they stay in service until a module fails or capacity needs change.

What limit appears first when the 1TB kit runs at 4800 MT/s under sustained load?

The first limit is the CL40 latency combined with the 1.1 V operating point; bandwidth is fixed at PC5-38400, so throughput cannot exceed that rate regardless of workload duration.

How much heat and power do the 16×64 GB modules produce when the R660XS runs all day?

Each module draws 1.10 V with no heat spreader, so total power scales with 16 ranks of 2Rx4 DDR5; the registered design keeps signal current low, resulting in modest heat that the server's standard airflow handles.

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