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Eight green DDR5 RDIMM modules in anti-static packaging

NEMIX RAM

NEMIX RAM 1TB (8x128GB) DDR5 4800 CL40 4Rx4 ECC RDIMM ASRock IMB-1900/1903

SKU CH-RWGB-GN78F

1TB DDR5 ECC registered server memory kit of eight 128GB modules at 4800MHz CL40 for ASRock IMB-1900 and IMB-1903 motherboards

  • 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 capacity for large-scale workloads
  • DDR5 4800 speed for high-throughput data
  • CL40 latency with registered ECC reliability
  • 1V operation reduces server power draw
  • Validated for ASRock IMB-1900 and IMB-1903

ASRock IMB-1900/1903 DDR5 Kit

This 1TB kit contains eight 128GB DDR5 RDIMMs built for ASRock Industrial IMB-1900 and IMB-1903 motherboards. The modules are registered, 4Rx4 ECC parts that run at 4800MT/s with a CL40 latency. They are designed for servers and workstations that require maximum memory capacity per slot.

Sustained-load behaviour

Registered buffering and ECC correction keep data integrity stable during continuous workloads. The 4Rx4 organisation spreads access across four ranks per module, helping the memory controller maintain throughput without timing violations. CL40 latency is consistent across all eight modules when the kit is fully populated.

Thermals, noise and power

Modules operate at 1.1V and have no heat spreaders, relying on chassis airflow for cooling. Power draw scales with the eight-module population but remains within standard DDR5 limits. No active cooling is included, so system fans must provide sufficient airflow over the 288-pin DIMMs.

How it compares

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

Price $33,335.99
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 $33.34 per GB
Pricier than about 90% 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 numberMR38400-744K8
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 systemsASRock Industrial
In the box
Included items1 TB (8 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How much heat does the 1.1 V DDR5 kit generate when running all day in a fully populated server?

Each module operates at 1.1 V with no heat spreader, so sustained load produces modest heat that standard server airflow handles without extra cooling.

What motherboard must already be installed for this 1 TB kit to function?

The kit is validated for ASRock Industrial EATX boards IMB-1900 and IMB-1903 with 288-pin DDR5 RDIMM slots.

Can the 4Rx4 registered DIMMs share channels with other DDR5 ECC RDIMMs I keep?

Yes, provided the board supports mixed-rank populations; the 4Rx4 modules follow standard DDR5 ECC RDIMM electrical specs for compatible mixing.

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