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Four green DDR5 RDIMM modules without heat spreaders, 288-pin, 128GB each

NEMIX RAM

NEMIX RAM 512GB 4x128GB DDR5 6400 CL52 1.1V ECC RDIMM Supermicro H14SSL-NT

SKU CH-W48F-9GQE0

Four 128GB DDR5 RDIMMs deliver 512GB of registered ECC memory at 6400MHz CL52 for the Supermicro H14SSL-NT

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 512 GB total capacity from four 128 GB modules for maximum server density
  • DDR5 6400 speed with CL52 latency delivers rated throughput on supported platforms
  • 1 V registered ECC RDIMM architecture reduces controller load and corrects single-bit errors
  • 288-pin 2Rx4 form factor matches Supermicro H14SSL-NT memory population rules exactly
  • Lifetime replacement warranty with US-based technical support included

Capacity and compatibility

This kit provides 512GB of DDR5 memory in four 128GB registered ECC RDIMMs. It is built to match the Supermicro H14SSL-NT motherboard's 288-pin RDIMM slots, 2Rx4 rank structure and 1.10V operating voltage for full-capacity recognition at rated speed.

Thermals and power

Modules run at 1.10V without heat spreaders, relying on server chassis airflow for cooling. Registered buffering reduces electrical load on the memory controller, helping the fully populated configuration stay within standard DDR5 power limits during sustained workloads.

Build integration

The 288-pin RDIMM form factor fits only boards that require registered ECC memory; it will not work in UDIMM or SODIMM slots. Populating all four slots delivers the rated 512GB capacity while ECC corrects single-bit errors to protect data integrity in production environments.

How it compares

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

Price $16,964.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $33.13 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 numberMR51200-724K4
Total capacity512 GB (4 × 128 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 items512 GB 4 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I install the 4x128GB DDR5 6400 RDIMM kit in the Supermicro H14SSL-NT and what slot order mistake do builders make?

Follow the motherboard manual's DIMM population chart for the 288-pin RDIMM slots; the common error is filling slots sequentially instead of the prescribed per-channel order, which prevents the 512GB kit from training at 6400 MT/s.

What maintenance or replacement will the 2Rx4 registered ECC modules need over their service life?

The modules have no heat spreader and no moving parts, so no scheduled maintenance is required; replacement only occurs if a DIMM fails, which is covered by the lifetime replacement warranty.

What limit appears first when the 1.1V CL52 kit runs sustained workloads on the H14SSL-NT?

The memory controller's maximum supported speed and total capacity ceiling are reached before thermal throttling, because the registered 2Rx4 architecture runs at the rated 6400 MT/s without a heat spreader.

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