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Two green DDR5 RDIMM modules with black chips and gold contacts, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 4800 ECC Registered RDIMM 256GB (2 x 128GB) Supermicro H13DSH memory upgrade

SKU CH-M2YB-Z3TZ1

A 256 GB DDR5-4800 ECC registered RDIMM kit (2 × 128 GB) validated for the Supermicro H13DSH motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

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  • 256 GB capacity with dual 128 GB modules for maximum server density
  • DDR5 4800 speed at CL40 latency for rated bandwidth
  • Registered ECC RDIMM design prevents silent data corruption under load
  • 1 V operation matches the Supermicro H13DSH memory controller exactly
  • 288-pin 2Rx4 form factor verified for the H13DSH motherboard

Exact-match DDR5-4800 ECC RDIMM kit

This 256 GB kit delivers two 128 GB registered DDR5 modules built for the Supermicro H13DSH motherboard. Each DIMM runs at 4800 MT/s with CL40 latency at 1.10 V and uses a 2Rx4 organisation. The 288-pin RDIMM form factor matches the board's registered-memory requirement exactly.

256 GB registered capacity with ECC

The dual-rank design lets the memory controller drive every slot at full speed while ECC corrects single-bit errors on the fly. Registered buffering offloads the controller so all channels stay stable when fully populated. Headroom ends at the board's maximum supported density and population rules, which vary by BIOS revision and CPU configuration.

Drops into H13DSH DDR5 slots

Installation follows the motherboard's validated DIMM population order; no heat spreader means standard airflow is sufficient. The kit frees you from mixing ranks or voltages that cause down-clocking or boot failures. Verify the manual for approved capacities and slot sequence before fitting the modules.

How it compares

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

Price $8,424.99
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 $32.91 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 numberMR38400-724K2
Total capacity256 GB (2 × 128 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 2 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Will this 256GB DDR5 4800 kit run at rated speed when installed alongside existing DDR5 4800 modules in my Supermicro H13DSH?

The kit is spec-matched to the H13DSH memory controller at DDR5 4800 CL40 1.1V 2Rx4; when populated per the motherboard manual it will operate at the rated speed.

How can I confirm the 2 x 128GB modules are recognized at full 256GB capacity after installation?

Check the BIOS memory map or operating system memory report — both should show 256GB total with each slot reporting 128GB at DDR5 4800.

Does the MR38400-724K2 package include only the two 128GB RDIMMs, or are any tools or cables required separately?

The box contains the 2 x 128GB DDR5 4800 ECC Registered RDIMMs only; no tools, cables or additional hardware are included.

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