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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 4800 CL40 1.1V ECC Registered RDIMM Supermicro H13DSG-O-CPU-D memory upgrade

SKU CH-N1S3-E6691

A 256 GB DDR5 server memory kit of four 64 GB registered ECC RDIMMs running at 4800 MT/s with CL40 latency and 1.1 V operation, validated for the Supermicro H13DSG-O-CPU-D motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 4X64GB

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  • 256 GB capacity from four 64 GB modules enables full server utilisation
  • DDR5 4800 speed with CL40 timing delivers rated throughput for the platform
  • Registered ECC architecture offloads the controller and corrects single-bit errors automatically
  • 1 V operating voltage matches the motherboard's memory controller specification exactly
  • 288-pin RDIMM form factor fits the Supermicro H13DSG-O-CPU-D slots without adapters

Exact-match DDR5 kit for Supermicro H13DSG-O-CPU-D

This 256GB kit contains four 64GB DDR5 4800 CL40 registered ECC RDIMMs built to the voltage and timing the board expects. It is designed for administrators who need the full 256GB capacity recognised immediately without manual tuning.

Upgrade from smaller or slower registered DDR5 sets

The jump is worth it when your workload outgrows the current memory ceiling and the motherboard population rules allow four 2Rx4 modules at the rated 4800 speed. Buyers who need a different rank structure, a lower voltage, or a UDIMM form factor cannot use this kit.

Straightforward RDIMM installation

Align the 288-pin modules with the keyed slots and press until the latches engage, then follow the manual's approved population order for all four channels. The most common issue is ignoring the board's specific slot sequence, which prevents the system from posting at full capacity.

How it compares

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

Price $6,965.99
Pricier than about 83% 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 $27.21 per GB
Pricier than about 76% 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 numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
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 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the Supermicro H13DSG-O-CPU-D motherboard slots?

Yes, the 288-pin RDIMM form factor matches the DDR5 slots on the H13DSG-O-CPU-D. The kit is verified for this board, so the modules seat correctly and are recognised at full 256GB capacity.

What is the correct population order for the four 64GB 2Rx4 modules on this board?

Install the modules following the motherboard manual's DIMM population sequence for four DIMMs per CPU. The board's silkscreen or manual shows which slots to fill first; using the wrong order can prevent the system from posting or limit speed.

Do these registered ECC modules need any firmware updates or battery-backed maintenance over time?

No firmware updates are required for the memory itself. ECC correction is handled by the memory controller. If a module fails, replace it with an identical 64GB 2Rx4 DDR5-4800 CL40 1.1V RDIMM to keep rank and timing consistency.

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