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Green circuit board DDR5 RDIMM memory module with black chips no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 2Rx4 1.1V ECC RDIMM Supermicro H13SSF memory upgrade

SKU CH-E9XT-KA336

128 GB DDR5-4800 ECC registered RDIMM validated for Supermicro H13SSF servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB

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  • 128 GB DDR5-4800 capacity runs at full rated speed on Supermicro H13SSF
  • Registered ECC RDIMM with 2Rx4 organisation offloads the memory controller for stable full-population operation
  • CL40 CAS latency and 1.10 V voltage match the board's memory-controller expectations exactly
  • 288-pin DDR5 RDIMM form factor fits the H13SSF slots without adapters or mismatched modules
  • Major OEM Samsung, Micron or Hynix chips provide enterprise-grade component reliability

Exact-match server upgrade

This 128GB DDR5 RDIMM is built to the precise rank, voltage and timing the Supermicro H13SSF memory controller expects. It installs as a single registered ECC module so the system recognises full capacity at the rated 4800 speed without manual tuning.

Registered ECC stability

The 2Rx4 registered architecture buffers each command, letting every slot run fully populated while ECC corrects single-bit errors on the fly. This combination stops silent data corruption and unplanned reboots before they reach production workloads.

288-pin RDIMM form factor

The module uses the 288-pin registered DIMM layout the H13SSF requires, not a UDIMM or SODIMM. No heat spreader is fitted, so clearance follows the board's standard DIMM spacing rules; population order must still follow the motherboard manual.

How it compares

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

Price $3,674.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.71 per GB
Pricier than about 81% 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 numberMR38400-724K1
Total capacity128 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 items128 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 ECC RDIMM require any firmware updates or periodic re-seating to maintain stability in the Supermicro H13SSF?

No firmware updates or scheduled re-seating are needed. The registered ECC design corrects single-bit errors automatically and the module runs at the rated 4800 speed once installed.

What thermal or power limit appears first when the 128GB kit runs continuously at DDR5 4800?

The module operates at 1.1V without a heat spreader, so sustained loads stay within the standard DDR5 power envelope for registered DIMMs.

How much noise and heat does the RDIMM produce during 24-hour operation in a fully populated server?

The DIMM has no moving parts and no heat spreader, so it adds no audible noise and only nominal heat at 1.10V under continuous use.

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