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

NEMIX RAM

NEMIX RAM DDR5 4800 256GB (2x128GB) ECC RDIMM CL40 1.1V 2Rx4 Supermicro H13SSF memory upgrade

SKU CH-NBXP-NQD1W

256 GB DDR5 4800 ECC RDIMM kit with two 128 GB registered modules at CL40 and 1.1 V, validated for the Supermicro H13SSF motherboard

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.10V
  • ECCYes

Size 256GB 2X128GB

Show 30 more configurations
  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR5 4800 speed with CL40 latency delivers rated throughput on supported platforms
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated channels
  • 1 V operation at 2Rx4 rank matches the board's memory-controller requirements
  • Verified 288-pin RDIMM fitment for Supermicro H13SSF motherboard memory slots

Supermicro H13SSF DDR5 upgrade

This 256 GB kit (2 x 128 GB) is built for the Supermicro H13SSF motherboard. It uses the 288-pin DDR5 RDIMM form factor that the board requires and matches the exact rank, voltage and timing the memory controller expects.

Capacity and registered headroom

Two 128 GB registered ECC modules give 256 GB total, allowing full population of supported slots at rated DDR5-4800 speed. Registered architecture offloads the memory controller so every slot runs fully populated, while ECC corrects single-bit errors on the fly. Systems needing more memory than the board supports or requiring unbuffered UDIMMs cannot use this kit.

Thermals and power draw

Modules operate at 1.10 V with CL40 latency and no heat spreaders, relying on server chassis airflow for cooling. The low voltage and registered design keep power draw modest under normal loads, while the bare PCB allows unrestricted airflow in dense configurations.

Highlights

  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR5 4800 speed with CL40 latency delivers rated throughput on supported platforms
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated channels
  • 1 V operation at 2Rx4 rank matches the board's memory-controller requirements
  • Verified 288-pin RDIMM fitment for Supermicro H13SSF motherboard memory slots

Specifications

BrandNEMIX RAM
SeriesNEMIX RAM Original Series Server Memory
ModelDDR5 ECC RDIMM Registered Server Memory
Part NumberMR38400-724K2
Capacity256GB (2 x 128GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetMajor OEM Samsung, Micron, Hynix
Heat SpreaderNo
Compatible SystemSupermicro
FeaturesDDR5 ECC RDIMM Motherboard Compatible
Package Content256GB 2X128GB DDR5 4800MHz PC5-38400 2Rx4 1.1V 288-PIN ECC RDIMM KIT

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Questions about this item

Will this 256GB DDR5 4800 ECC RDIMM kit work with existing DDR5 modules in my Supermicro H13SSF?

Mixing kits is not recommended. The H13SSF requires registered ECC RDIMMs with matching 2Rx4 rank, 1.1V voltage, and CL40 timing for stable operation across all populated slots.

How can I confirm the 2x128GB modules are running at DDR5 4800 with ECC active after installation?

Enter the BIOS and verify the memory speed shows 4800 MT/s, total capacity reads 256GB, and ECC status is enabled. The registered design also reduces electrical load for reliable full-population operation.

Does the MR38400-724K2 kit include heat spreaders or any cables, or just the two 288-pin RDIMMs?

The package contains only the two 128GB DDR5 4800 ECC registered RDIMMs. No heat spreaders, cables, or additional accessories are included with this kit.

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