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Two green DDR5 RDIMM modules without heat spreaders, 288-pin, 256GB kit

NEMIX RAM

NEMIX RAM DDR5 256GB (2x128GB) 6400MHz CL52 2Rx4 ECC RDIMM Supermicro H14DSG-O-CPU

SKU CH-0QWY-X0KNV

256 GB dual-rank DDR5 server kit with ECC and registered buffering for the Supermicro H14DSG-O-CPU motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Exact DDR5-6400 CL52 1.1V spec matches the server memory controller
  • 256GB kit (2×128GB 2Rx4) fills both channels at full rated speed
  • Registered ECC RDIMM architecture offloads the controller and corrects single-bit errors
  • 288-pin RDIMM form factor verified for the Supermicro H14DSG-O-CPU motherboard
  • Major OEM Samsung Micron Hynix chips ensure enterprise-grade reliability

System-Specific DDR5 ECC RDIMM Kit

This 256GB kit contains two 128GB DDR5-6400 registered ECC RDIMMs built to the exact rank, voltage and timing the Supermicro H14DSG-O-CPU motherboard expects. The modules are CL52 at 1.1V and use the 288-pin RDIMM form factor required by the board. Major OEM DRAM from Samsung, Micron or Hynix provides enterprise-grade stability for fully populated slots.

Suited For Verified Supermicro Upgrades

This kit suits administrators upgrading a Supermicro H14DSG-O-CPU system that requires 2Rx4 registered ECC memory at DDR5-6400. It is not for builds that need unbuffered UDIMMs, SODIMM form factors, non-ECC modules or a different speed, voltage or rank configuration than the board specifies.

Deciding Spec DDR5-6400 CL52 1.1V 2Rx4 RDIMM

The single specification that decides fitment is the DDR5-6400 CL52 1.1V 2Rx4 registered ECC RDIMM profile. Only modules matching this exact combination of speed, latency, voltage, rank and registered architecture will be recognised at full capacity and run at rated speed on the target motherboard.

How it compares

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

Price $8,392.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $32.79 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 numberMR51200-724K2
Total capacity256 GB (2 × 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 items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What motherboard must I already have for this 256GB DDR5 6400MHz RDIMM kit to work?

This kit is verified for the Supermicro H14DSG-O-CPU motherboard, which requires 288-pin Registered DDR5 DIMMs and follows specific population rules for full-capacity operation.

How will these 2Rx4 Registered ECC modules behave if I keep older DDR5 RDIMMs in the remaining slots?

Mixing different ranks, speeds, or latencies can force the memory controller to downclock all channels; the board manual should be consulted for approved population orders before adding this kit.

How can I confirm the kit is running at its rated 6400MHz CL52 after installation?

Enter the BIOS or use a hardware-information utility to verify the memory frequency reads 6400 MT/s and the CAS latency shows CL52 at 1.10 V.

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