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Twelve green DDR5 RDIMM modules in a row, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 4800 1.5TB 12x128GB ECC RDIMM Supermicro H13SSH

SKU CH-RKY4-FK6ED

1.5 TB DDR5-4800 ECC RDIMM kit of twelve 128 GB modules at 1.1 V CL40 for Supermicro H13SSH servers

  • Total capacity1.5 TB (12 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 1.5TB 12X128GB

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  • 5 TB total capacity from 12 modules of 128 GB each
  • DDR5 4800 speed with CL40 latency for rated server performance
  • Registered ECC design corrects single-bit errors and stabilises full population
  • 1 V operation matches the Supermicro H13SSH memory controller spec
  • 288-pin RDIMM form factor fits the board's required slot type

Exact-match server kit

This 1.5 TB kit contains twelve 128 GB DDR5 RDIMMs rated at 4800 MT/s with CL40 latency and 1.1 V operation. It is built for administrators upgrading a Supermicro H13SSH motherboard that requires registered ECC modules in a fully populated configuration.

Registered ECC changes stability

Registered buffering reduces electrical load on the memory controller so all twelve slots can run at the rated 4800 MT/s without downclocking. On-die ECC detects and corrects single-bit errors in flight, preventing silent data corruption that would otherwise crash production workloads or corrupt databases.

DDR5 4800 practical limits

The JEDEC DDR5-4800 standard caps transfer rate at 4800 MT/s and fixes the command/address bus at 1.1 V, so this kit cannot exceed that speed on the H13SSH platform. Population rules in the motherboard manual dictate which slots must be filled first; incorrect ordering will halt POST or reduce usable capacity.

How it compares

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

Price $41,569.99
Pricier than about 95% of the 21,161 comparable items (median $397.99).
Total capacity 1.5 TB (12 × 128 GB)
Higher than about 97% of the 20,941 comparable items (median 32 GB).
Price per GB $27.71 per GB
Pricier than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-724K12
Total capacity1.5 TB (12 × 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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items1.5 TB 12 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Will the 12 modules need any active cooling such as fans or liquid loops during continuous operation?

The modules have no heat spreaders and run at 1.1V, so typical server chassis airflow is sufficient; no extra active cooling is required.

What limits sustained full-capacity throughput on the Supermicro H13SSH when all 12 slots are populated?

The DDR5 4800 CL40 timing and the board's memory controller define the maximum sustained bandwidth; no higher speed is supported with this population.

How much power does the 1.5 TB kit draw and how hot does it get under 24/7 load?

At 1.1V the 12 registered DIMMs consume modest power and stay cool with standard server airflow; no special thermal management is needed.

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