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Eight green DDR5 RDIMM modules with black chips, no heat spreaders, 288-pin, 1.1V

NEMIX RAM

NEMIX RAM MR38400-744K8 1TB (8×128GB) DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade

SKU CH-661W-H6TGQ

Eight 128 GB DDR5 RDIMMs deliver 1 TB of registered ECC memory at 4800 MT/s for Supermicro CloudDC servers

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1TB total capacity across 8 DDR5 modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity
  • 1V operation reduces power draw
  • Validated for Supermicro CloudDC SuperServer systems

1 TB DDR5-4800 ECC RDIMM kit

This 1 TB kit contains eight 128 GB registered DDR5 modules rated at 4800 MT/s with CL40 latency and 1.1 V operation. It is built for Supermicro CloudDC SuperServer systems such as the SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R. ECC and registered buffering protect data integrity in continuous server workloads.

Who this suits and who it does not

Suits administrators expanding memory in the listed Supermicro platforms where 288-pin DDR5 RDIMM slots are populated in matched sets. Not for desktop motherboards, laptops or workstations that require unbuffered UDIMM or SO-DIMM form factors, or for systems limited to lower capacities per slot.

The spec that decides fit

The module uses a 288-pin DDR5 RDIMM interface with 4Rx4 organisation and registered buffering; the motherboard must support this exact pin-out, voltage and rank configuration for the kit to function.

How it compares

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

Price $27,979.99
Pricier than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $27.98 per GB
Pricier than about 78% 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 lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K8
Total capacity1 TB (8 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items1 TB (8 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 4800 MT/s DDR5 modules throttle under sustained server workloads?

The kit runs at DDR5 4800 with CL40 latency and 1.10 V, so sustained throughput is limited by that rated speed and timing rather than thermal throttling.

How much heat and power should I expect from eight 128 GB registered DIMMs running continuously?

Eight 4Rx4 RDIMMs at 1.10 V draw modest power for DDR5 and have no heat spreaders, so airflow across the 288-pin slots is the main cooling requirement.

Which Supermicro SuperServer models must I already own for this 1 TB kit to be compatible?

The memory is validated for SuperMicro CloudDC SuperServer SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R systems.

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