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Green bare circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 128GB DDR5 4800MHz PC5-38400 2Rx4 1.1V CL40 288-PIN ECC RDIMM Supermicro H14DSG-OD memory upgrade

SKU CH-WGXM-JKN8K

128 GB DDR5 4800 MHz ECC registered RDIMM built for the Supermicro H14DSG-OD motherboard

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

Size 128GB

Show 30 more
  • 128GB capacity lets the Supermicro H14DSG-OD run fully populated at rated speed
  • DDR5 4800MHz PC5-38400 matches the memory controller spec for correct recognition
  • Registered ECC 2Rx4 architecture offloads the controller and corrects single-bit errors on the fly
  • 1V CL40 timing aligns with the board's population rules for stable operation
  • 288-pin RDIMM form factor fits the Supermicro H14DSG-OD motherboard exactly

Exact-Match DDR5 Server Upgrade

This 128 GB DDR5-4800 registered ECC RDIMM is built to the precise rank, voltage and timing the Supermicro H14DSG-OD motherboard expects. It installs as a single 288-pin module so the memory controller recognises the full capacity immediately.

Sustained Enterprise Stability

Registered buffering offloads the memory controller, allowing every slot to run fully populated at the rated 4800 MT/s without throttling. On-die ECC corrects single-bit errors in real time, preventing silent data corruption and unplanned reboots during continuous production workloads.

Installation And Population Rules

The module fits the board's 288-pin RDIMM slots directly, but population order and maximum supported capacity vary by BIOS revision. Consult the system manual for the approved slot sequence before installation; using an incorrect order or exceeding the validated limit will prevent the server from posting.

How it compares

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

Price $4,194.99
Pricier than about 77% 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 $32.77 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 numberMR38400-724K1
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

Does the 1.1 V operating voltage keep the 2Rx4 ECC RDIMM cool during 24/7 server workloads?

The modules run at 1.10 V with no heat spreader, so airflow through the chassis is what keeps temperatures in check during continuous operation.

What motherboard slot and population rules does the 288-pin registered kit require?

It needs a DDR5 RDIMM slot on the Supermicro H14DSG-OD and must follow that board's specific population order for full 128 GB recognition.

Can the CL40 registered ECC modules run alongside older DDR5 DIMMs already installed in the same system?

Mixing ranks, voltages or timings is not recommended; the board will typically downclock all channels to the slowest common settings, so identical kits are preferred.

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