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Four green DDR5 RDIMM modules in a kit

NEMIX RAM

NEMIX RAM 512GB (4×128GB) DDR5 6400 CL52 ECC Registered RDIMM Supermicro H13SST-GC memory upgrade

SKU CH-28X5-QWANH

512 GB DDR5 6400 CL52 ECC registered RDIMM kit built for the Supermicro H13SST-GC motherboard

  • 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
  • DDR5 6400 speed with CL52 latency for rated throughput
  • Registered ECC architecture prevents silent data corruption
  • 1 V operation matches the server memory controller spec
  • Verified fitment for Supermicro H13SST-GC motherboard

Exact-match DDR5-6400 kit for Supermicro H13SST-GC

This 512 GB kit contains four 128 GB DDR5-6400 RDIMMs built to the CL52 1.1 V 2Rx4 specification the Supermicro H13SST-GC memory controller expects. Registered ECC architecture lets every slot run fully populated at rated speed while correcting single-bit errors on the fly. System integrators upgrading that specific motherboard get a drop-in solution without manual timing adjustments.

Thermals noise and power draw

Operating at 1.1 V, the modules draw minimal power for their density and run without a heat spreader, relying on the server chassis airflow. Registered buffering reduces electrical load on the memory controller, keeping temperatures stable even with all four slots populated. No active cooling is included, so adequate case airflow is required for sustained workloads.

What the bundle changes

The kit delivers four matched RDIMMs in a single package, eliminating the guesswork of mixing ranks or voltages across channels. ECC and registered signalling together prevent silent data corruption and unplanned reboots in production environments. Buyers needing a different capacity, a UDIMM form factor, or non-ECC memory cannot use this kit.

How it compares

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

Price $18,868.99
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 $36.85 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 four 288-pin RDIMM modules in the Supermicro H13SST-GC and what slot order do people often get wrong?

Power down the server, open the chassis, and insert each 128 GB module into the slots specified by the motherboard manual for a four-DIMM population; the common mistake is filling the wrong channels first, which prevents the system from recognizing the full 512 GB at DDR5-6400.

What maintenance or replacement will this 512 GB DDR5 ECC RDIMM kit need over its service life?

No routine maintenance is required; the registered ECC design corrects single-bit errors automatically, and if a module ever fails the lifetime replacement warranty covers a direct swap of the defective 128 GB stick.

What is the first limit that appears when this memory runs at DDR5-6400 CL52 under sustained load?

The registered buffer and 1.1 V operation keep the memory controller stable, so the first practical ceiling is the motherboard's maximum supported capacity and population rules rather than a thermal or voltage limit on the modules themselves.

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