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Twelve green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 1.5TB 12x128GB DDR5 4800 CL40 1.1V ECC RDIMM Supermicro H14SSL-N memory upgrade

SKU CH-4CX1-JY6NB

A 1.5 TB registered ECC DDR5 kit of twelve 128 GB modules at 4800 MT/s, CL40, 1.1 V, validated for the Supermicro H14SSL-N motherboard

  • 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

Show 24 more
  • 5 TB total capacity from twelve 128 GB modules
  • DDR5 4800 speed with CL40 latency at 1.10 V
  • 2Rx4 registered ECC design prevents silent data corruption
  • 288-pin RDIMM form factor matches Supermicro H14SSL-N slots
  • Lifetime replacement warranty with US-based technical support

1.5TB DDR5 ECC RDIMM kit for Supermicro H14SSL-N

This kit delivers 1.5TB of registered DDR5 memory across twelve 128GB modules. It is built for the Supermicro H14SSL-N motherboard and matches the board's 288-pin RDIMM requirement. The 2Rx4 rank structure and 1.1V operating voltage align with the platform's memory controller expectations.

Registered ECC architecture with 2Rx4 organisation

Registered buffering reduces electrical load on the memory controller when all twelve slots are populated. ECC detects and corrects single-bit errors in flight, preventing silent data corruption. The CL40 latency and PC5-38400 speed rating are the exact figures the board's firmware anticipates for stable operation.

Twelve-slot capacity ceiling at DDR5-4800

The 1.5TB total fills every DIMM socket on the H14SSL-N at the platform's native 4800 MT/s rate. Workloads that scale beyond this capacity or demand higher memory frequencies will exceed what this kit and motherboard combination can provide.

How it compares

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

Price $44,097.99
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 $29.40 per GB
Pricier than about 83% 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 individual 128GB RDIMMs ever need firmware updates or scheduled replacement?

The modules are passive DDR5 components with no firmware to update; under normal server operation they run until a DIMM fails, at which point only the faulty stick is swapped.

What limits sustained throughput first — the CL40 latency or the DDR5-4800 bus?

The DDR5-4800 (PC5-38400) bus ceiling is reached before CL40 latency becomes the bottleneck in continuous workloads.

How much extra heat and power does the 1.5TB kit add when the Supermicro H14SSL-N runs 24/7?

Each 128GB RDIMM operates at 1.1V with no heat spreader, so total power scales with all 12 slots populated and airflow handles the resulting heat.

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