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Two green DDR5 RDIMM modules without heat spreaders in a 128GB kit

NEMIX RAM

NEMIX RAM DDR5 6400 128GB 2x64GB ECC Registered RDIMM Supermicro H14SSF memory upgrade

SKU CH-KA40-ZBZY8

128 GB DDR5-6400 ECC registered RDIMM kit (2 × 64 GB, CL52, 1.1 V, 2Rx4) validated for Supermicro H14SSF motherboards

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Exact DDR5-6400 CL52 1.10V timing matches Supermicro H14SSF controller
  • 128 GB (2×64 GB) 2Rx4 Registered ECC RDIMM fills every slot at full speed
  • ECC plus registered buffering corrects single-bit errors and offloads the memory controller
  • 288-pin RDIMM form factor is the precise module type the H14SSF requires
  • Built with major OEM Samsung Micron Hynix chips for enterprise-grade reliability

Exact-fit DDR5 server upgrade

This 128GB kit contains two 64GB DDR5 6400 Registered ECC RDIMMs built to the Supermicro H14SSF motherboard's exact specifications. The modules run at PC5-51200 with CL52 latency at 1.1V using a 2Rx4 rank structure. Registered buffering and on-die ECC protect data integrity across every populated slot.

Verify board population rules first

Confirm the H14SSF manual for approved DIMM population order, maximum capacity per channel, and any BIOS revision requirements before installation. The 288-pin RDIMM form factor is mandatory; UDIMM or SODIMM modules will not fit or function. Ensure all slots follow the board's specific population sequence for full recognition.

Replaces smaller or slower RDIMM kits

Upgrading from lower-capacity Registered ECC kits or slower DDR5 speeds is worthwhile when workloads demand full-channel population at rated frequency. The jump makes sense for virtualization hosts, database servers, or compute nodes that hit memory capacity limits or need the bandwidth headroom of PC5-51200.

How it compares

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

Price $3,981.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.11 per GB
Pricier than about 89% 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 numberMR51200-924K2
Total capacity128 GB (2 × 64 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 2 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Does the kit include anything besides the two 64 GB DDR5 6400 RDIMMs?

The package contains only the two 64 GB DDR5 6400 CL52 1.10 V 2Rx4 registered ECC RDIMMs; no heat spreaders, cables or tools are supplied.

When should I choose the 128 GB 2×64 GB kit instead of a smaller capacity?

Select this 128 GB kit when your Supermicro H14SSF configuration requires the maximum supported capacity per channel and you want both DIMMs matched for 2Rx4 registered ECC operation.

Will the modules run at DDR5 6400 CL52 automatically once installed in the H14SSF?

Yes, the kit is spec-matched to the board's memory controller so it is recognised at the rated DDR5 6400 speed, CL52 latency and 1.10 V without manual tuning.

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