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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 6400 CL52 2Rx4 1.1V ECC RDIMM Kit memory upgrade

SKU CH-D2HK-DKKRB

256 GB DDR5-6400 ECC registered kit with four 64 GB modules at CL52 and 1.1 V for the Supermicro H13DSH motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Exact-match 256GB kit runs at DDR5-6400 CL52 1.1V so the server recognises full capacity at rated speed
  • 2Rx4 Registered ECC RDIMM offloads the controller and corrects single-bit errors for enterprise stability
  • Verified fitment for Supermicro H13DSH motherboard with 288-pin RDIMM form factor and population rules
  • Major OEM Samsung Micron Hynix chips ensure consistent quality across all four 64GB modules
  • Lifetime replacement warranty with free US-based technical support included

Exact-match DDR5 server kit

This 256GB kit (4 x 64GB) delivers DDR5 6400 (PC5 51200) with CL52 latency at 1.10V. Registered ECC 2Rx4 RDIMM modules match the precise rank, voltage and timing the Supermicro H13DSH memory controller expects for full-capacity recognition and rated speed.

Registered architecture offloads the controller

Registered (buffered) design offloads the memory controller so every slot runs fully populated at full capacity while ECC catches and corrects single-bit errors on the fly. Low 1.10V operation and the absence of a heat spreader keep power draw and thermals modest in normal server workloads.

Requires DDR5 RDIMM slots and manual check

The 288-pin RDIMM form factor fits only DDR5 RDIMM slots — not UDIMM or SODIMM. Builders must consult the Supermicro H13DSH manual for supported capacities, approved DIMM population order and installation steps before purchase. No other motherboard or processor compatibility is implied.

How it compares

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

Price $8,160.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.88 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 numberMR51200-924K4
Total capacity256 GB (4 × 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 items256 GB 4 × 64 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 64GB DDR5 RDIMMs in the Supermicro H13DSH and which population order is the one people get wrong?

Install all four modules in the exact slot sequence shown in the H13DSH manual; the common mistake is skipping the prescribed population order, which prevents the board from recognising the full 256GB at DDR5-6400.

Will the Samsung Micron or Hynix chips on these ECC RDIMMs need any firmware updates or scheduled replacement?

No firmware updates or scheduled chip replacements are required; the on-die ECC and registered architecture handle error correction for the module's lifetime.

At what point does the 1.1V CL52 timing become the limiting factor during sustained server workloads?

The CL52 latency at 1.1V is the first timing ceiling you hit under continuous load; registered buffering keeps all four ranks stable at DDR5-6400 without further throttling.

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