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Green circuit board with black memory chips, gold edge connector, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 6400MHz PC5-51200 2Rx4 CL52 1.1V 288-PIN ECC RDIMM Supermicro H14SSF memory upgrade

SKU CH-41YH-DJTBH

128GB DDR5 6400MHz ECC registered RDIMM validated for Supermicro H14SSF servers

  • Total capacity128 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Exact-match 128 GB DDR5-6400 module recognised at full rated speed
  • Registered 2Rx4 architecture keeps every slot stable when fully populated
  • On-die ECC corrects single-bit errors before they corrupt data
  • 10 V operation matches the board's memory controller spec
  • 288-pin RDIMM form factor fits the Supermicro H14SSF motherboard

Exact-match DDR5 upgrade for Supermicro H14SSF

This NEMIX RAM module delivers 128GB of DDR5 6400 memory in a single 288-pin RDIMM. It operates at 1.1V with CL52 latency and uses a 2Rx4 registered ECC design. The specification matches the Supermicro H14SSF motherboard requirements so the system recognises the full capacity at rated speed.

Suited for administrators populating every slot

Registered buffering offloads the memory controller, allowing full population without signal degradation, while ECC corrects single-bit errors to prevent silent data corruption. Buyers who need unbuffered UDIMMs, SODIMMs, or non-ECC memory for a workstation or desktop platform should look elsewhere.

Simple slot insertion but strict population rules

The 288-pin RDIMM seats like any DIMM, yet the H14SSF manual defines exact slot order and maximum capacity per channel. Ignoring those rules is the most common cause of boot failure or reduced speed, so consult the motherboard documentation before installing.

How it compares

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

Price $4,656.99
Pricier than about 79% 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 $36.38 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-724K1
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What motherboard slot does the 288-pin DDR5 RDIMM require on the Supermicro H14SSF?

The module uses a 288-pin DDR5 RDIMM form factor that matches the registered DIMM slots on the Supermicro H14SSF motherboard.

Will the registered ECC design work with existing RDIMMs already installed in the server?

Yes, the 2Rx4 registered ECC architecture is designed to operate alongside other registered DIMMs following the board's population rules.

How can I confirm the kit is running at DDR5 6400 with CL52 after installation?

Check the BIOS memory information or OS tools such as dmidecode to verify the speed shows 6400 MT/s and the CAS latency reads 52.

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