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Single green 288-pin DDR5 RDIMM module without heat spreader, 128GB 4Rx4 CL40 1.1V ECC registered

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM 4Rx4 CL40 1.1V Dell PowerEdge R860

SKU CH-CFC1-91TTS

128 GB DDR5 4800 ECC registered RDIMM with CL40 latency and 1.1 V operation for Dell PowerEdge R860 servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128GB single module expands server capacity efficiently
  • DDR5 4800 speed handles demanding workloads
  • ECC registered design protects data integrity
  • CL40 latency at 1.1V balances performance and power
  • Tested compatible with Dell PowerEdge R860 rack server

128 GB DDR5 ECC RDIMM for Dell PowerEdge R860

This 128 GB registered DDR5 module is built for the Dell PowerEdge R860 rack server. It delivers error-correcting memory capacity for virtualisation, database and high-throughput workloads. The 4Rx4 organisation suits dense memory configurations. The module runs at the standard 1.1 V DDR5 voltage.

Tool-free DIMM slot installation

The 288-pin RDIMM inserts directly into the server's memory slots without tools. Installation typically takes minutes, but the R860 requires specific population sequences per CPU socket. Mixing ranks or skipping slots can prevent the system from posting. Always follow the server manual's population table for the chosen CPU count.

DDR5 4800 bandwidth and registered signal limits

The PC5-38400 interface provides 4800 MT/s transfer rates with CL40 latency. Registered buffering adds one clock cycle to command timing, which stabilises heavy loads but caps maximum frequency. The single 128 GB module occupies one slot, limiting total capacity to the server's maximum DIMM count.

How it compares

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

Price $3,709.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $28.98 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 numberMR38400-744K1
Total capacity128 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
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

How can I confirm the 128GB DDR5 4800 module is running at CL40 and 1.1V after installation?

Enter the system BIOS or use a tool like CPU-Z to verify the reported speed shows 4800 MT/s, CAS latency reads 40, and voltage reads 1.1V for the installed DIMM.

What ships with the MR38400-744K1 module and what must I source separately?

The package contains the single 128GB 288-pin DDR5 ECC RDIMM; no heat spreader, cables, or additional hardware are included.

Which capacity and rank configuration matches the Dell PowerEdge R860 qualified part MR38400-744K1?

Choose the 128GB 4Rx4 DDR5 4800 ECC RDIMM at 1.1V — this is the exact capacity, rank, and voltage validated for the R860.

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