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Green bare DDR5 RDIMM module with black chips and gold contacts

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 2Rx4 ECC Registered RDIMM Supermicro H14SST-G memory upgrade

SKU CH-9MB6-4SQPJ

128 GB DDR5 4800 CL40 2Rx4 ECC registered RDIMM validated for Supermicro H14SST-G motherboards

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB

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  • Exact-match DDR5-4800 CL40 2Rx4 ECC RDIMM recognised at full 128 GB capacity
  • Verified fit for Supermicro H14SST-G motherboard 288-pin RDIMM slot
  • Registered architecture offloads controller for stable fully-populated operation
  • ECC corrects single-bit errors on the fly preventing silent data corruption
  • Lifetime replacement warranty with free US-based technical support

Exact-match DDR5 upgrade for Supermicro H14SST-G

This 128 GB DDR5 4800 RDIMM delivers the precise 2Rx4 registered ECC configuration the H14SST-G memory controller expects. It installs in the board's 288-pin slots at 1.1 V and CL40 so the system recognises full capacity and runs at rated speed without manual tuning.

DDR5 4800 registered ECC limits

Registered architecture offloads the controller to allow full-slot population at 4800 MT/s while ECC corrects single-bit errors on the fly. The 2Rx4 organisation and 1.1 V operation are fixed by the DDR5 4800 standard, so the module cannot run at higher speeds or lower latencies than the platform defines.

2Rx4 registered ECC decides fit

The single specification that determines compatibility is the 2Rx4 registered ECC layout. Boards that require UDIMM, SODIMM, unbuffered, non-ECC or a different rank structure will not accept this module; only systems validated for 2Rx4 RDIMM at DDR5 4800 should use it.

How it compares

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

Price $3,683.99
Pricier than about 75% 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 $28.78 per GB
Pricier than about 81% 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 numberMR38400-724K1
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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 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

Should I choose the 128GB 2Rx4 RDIMM or a different capacity for my Supermicro H14SST-G?

The 128GB 2Rx4 Registered ECC module matches the board's DDR5 4800 spec, 1.10V voltage and CL40 timing. Consult your motherboard manual for supported capacities and the approved population order before deciding.

What does the DDR5 4800 CL40 rating deliver once the module is installed in the server?

The module runs at the rated 4800 MT/s with CL40 latency at 1.10V. Registered buffering lets every slot operate fully populated at that speed, while ECC corrects single-bit errors on the fly to prevent silent data corruption.

Is the 288-pin RDIMM interface the right fit for the H14SST-G and what does it limit in practice?

Yes — the board requires 288-pin DDR5 RDIMMs, not UDIMMs or SODIMMs. The Registered design offloads the memory controller so all slots can run at the full 128GB capacity and 4800 MT/s without signal degradation.

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