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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 128GB 4x32GB DDR5 6400 CL52 2Rx8 ECC Registered RDIMM memory upgrade

SKU CH-66KR-9503M

128 GB DDR5-6400 ECC registered RDIMM kit in four 32 GB modules, CL52 at 1.1 V, validated for Supermicro H13SRH motherboards

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB total capacity from four 32 GB modules
  • DDR5 6400 speed with CL52 latency for rated throughput
  • Registered ECC architecture corrects single-bit errors on the fly
  • 1 V operation matches server memory-controller specifications
  • Verified fit for Supermicro H13SRH motherboard 288-pin RDIMM slots

Exact-match server upgrade

This 128GB kit contains four 32GB DDR5 modules built to the exact rank, voltage and timing the Supermicro H13SRH motherboard expects. Registered ECC architecture allows every slot to run fully populated at rated speed while correcting single-bit errors before they reach production workloads.

Thermals power and noise

Operating at 1.1V with no heat spreader, the modules draw minimal power and rely on standard server airflow for cooling. Registered buffering reduces electrical load on the memory controller, keeping temperatures stable during sustained multi-threaded tasks.

288-pin RDIMM form factor

The kit uses 288-pin DDR5 RDIMM modules; it will not fit UDIMM or SODIMM slots and is not compatible with desktop or laptop platforms. Verify your system manual for approved population order and maximum supported capacity before purchase.

How it compares

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

Price $4,732.99
Pricier than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $36.98 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 numberMR51200-328K4
Total capacity128 GB (4 × 32 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 rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB 4 × 32 GB DDR5 6400 MHz PC5-51200 2Rx8 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I install the 4x32GB DDR5 6400 RDIMM kit in my Supermicro H13SRH, and what step is often missed?

Populate all four slots in the exact order shown in the H13SRH manual; the step most people skip is verifying the approved DIMM population sequence before powering on.

What maintenance or replacement will the 2Rx8 ECC Registered modules need over time?

No scheduled maintenance is required; if a module fails the lifetime replacement warranty covers it, and ECC continues correcting single-bit errors throughout the module's service life.

What limit appears first when the 128GB kit runs sustained workloads at 1.1V?

The registered buffer and ECC logic keep every slot stable at full 6400 speed, so the first practical limit is the motherboard's maximum supported capacity rather than memory throttling.

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