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Green circuit board DDR5 RDIMM with black chips, no heat spreader, 288 pins

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM 4Rx4 CL40 1.1V 288-Pin MR38400-744K1 memory upgrade

SKU CH-M3HK-HC96G

128 GB DDR5 4800 ECC RDIMM with CL40 latency and 1.1 V operation for ASRock Industrial IMB-1900 and IMB-1902 motherboards

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • ECC protection safeguards data integrity with registered DDR5 architecture
  • 128 GB single-module capacity enables dense server configurations
  • 4800 MT/s DDR5 speed delivers high-throughput performance
  • CL40 latency at 1.1 V balances responsiveness and efficiency
  • Validated for ASRock Industrial IMB-1900 and IMB-1902 motherboards

128GB DDR5 ECC RDIMM for ASRock Industrial servers

This 128GB DDR5 4800 registered DIMM targets ASRock Industrial EATX motherboards IMB-1900 and IMB-1902. It delivers ECC protection and registered signalling for workloads that require data integrity and high capacity in a single module.

DDR5 4800 registered interface limits

The DDR5 4800 standard caps transfer rate at PC5-38400 while the registered buffer adds one cycle of command latency. CL40 timing and 1.1V operation define the electrical envelope; systems that cannot supply registered DDR5 at this speed will not post.

128GB capacity in a single 4Rx4 module

One 288-pin DIMM provides 128GB using 4Rx4 organisation, maximising density per slot. Headroom exists for multi-module configurations up to the board’s slot count; workloads exceeding total platform capacity or requiring lower latency than CL40 will need a different memory class.

How it compares

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

Price $3,971.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.03 per GB
Pricier than about 89% 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 numberMR38400-744K1
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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Industrial
In the box
Included items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V 288-PIN ECC RDIMM

Questions about this item

Should I pick the 128 GB single module or look for a kit with multiple sticks?

This part is sold as a single 128 GB module (1 x 128 GB). If your board has multiple RDIMM slots and you need more capacity, add additional modules of the same specification.

What does the DDR5 4800 rating mean for actual throughput in my server?

The module is rated DDR5 4800 (PC5-38400). Real-world throughput depends on the platform's memory controller, channel population and BIOS settings.

Is the 288-pin RDIMM interface compatible with standard DDR5 server boards and what limits apply?

It uses the 288-pin DDR5 RDIMM form factor with ECC and registered buffering. Compatibility is confirmed for ASRock Industrial EATX IMB-1900 and IMB-1902; other boards must support DDR5 RDIMM, 4Rx4 organisation and 1.1 V operation.

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