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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM DDR5 128GB (4x32GB) 6400MHz CL52 ECC Registered RDIMM 2Rx8 1.1V Supermicro H13SRA-F/TF

SKU CH-8SDC-W07Q4

128 GB DDR5 server memory kit with four 32 GB registered ECC modules at 6400 MHz CL52 1.1 V for Supermicro H13SRA-F/TF

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 4X32GB

Show 6 more
  • 128 GB capacity across four 32 GB modules for high-density server workloads
  • DDR5-6400 speed with CL52 latency delivers rated throughput for Supermicro H13SRA-F/TF
  • Registered ECC RDIMM architecture offloads the controller and corrects single-bit errors
  • 1 V operation matches the platform's voltage requirement for stable full-population use
  • 288-pin 2Rx8 form factor fits the exact DIMM slots specified by the motherboard

Purpose-built server memory kit

This 128 GB kit contains four 32 GB DDR5 RDIMMs that run at 6400 MT/s with CL52 timing. Registered ECC architecture and 2Rx8 organisation let the Supermicro H13SRA-F and H13SRA-TF motherboards address the full capacity at rated speed. It is not suited for desktops or workstations that accept only unbuffered UDIMMs.

Thermals and power profile

Modules operate at 1.10 V and have no heat spreader, relying on chassis airflow for cooling. Registered buffering reduces electrical load on the memory controller, keeping per-DIMM power draw low during typical server workloads. Acoustic output is determined entirely by the system fans.

Sustained-load behaviour

ECC corrects single-bit errors in real time, preventing silent data corruption during continuous operation. Registered design maintains signal integrity across all four populated slots, so bandwidth and latency remain stable under prolonged memory-intensive tasks. Buyers who need higher frequencies, lower latencies or larger per-module capacities should verify the motherboard's qualified-vendor list before ordering.

How it compares

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

Price $4,577.99
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 $35.77 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 numberMR51200-328K4
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

Other versions of this model

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Questions about this item

How do I install the four 32 GB DDR5 RDIMMs in the Supermicro H13SRA-F and what slot order should I follow?

Populate all four 288-pin RDIMM slots following the motherboard manual's population sequence for 128 GB kits; the registered design ensures the memory controller recognises the full capacity at 6400 MHz.

Will the 2Rx8 DDR5 modules need any firmware updates or component replacements during their service life?

The modules use major OEM Samsung, Micron or Hynix chips with on-die ECC; no firmware updates or field-replaceable parts are required.

At what point does the 1.1 V CL52 DDR5 kit hit its thermal or bandwidth ceiling under continuous load?

The registered architecture offloads the controller so all four ranks sustain 6400 MHz PC5-51200 throughput; the first limit encountered is the platform's memory-controller bandwidth ceiling.

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