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Green rectangular circuit board with gold edge connector and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800MHz 2Rx4 CL40 1.1V ECC RDIMM Supermicro H14SHM memory upgrade

SKU CH-WQKW-6A4SV

128GB DDR5 4800MHz ECC registered RDIMM with CL40 latency and 1.1V operation, validated for Supermicro H14SHM motherboards

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

Size 128GB

Show 24 more
  • 128 GB capacity fills every slot on the Supermicro H14SHM
  • DDR5 4800 MT/s runs at the board's rated speed
  • CL40 latency matches the memory controller's timing table
  • ECC RDIMM corrects single-bit errors to prevent silent data corruption
  • 1 V operation keeps power draw at spec

Server memory upgrade

This 128GB DDR5 4800MHz registered ECC RDIMM is built for the Supermicro H14SHM motherboard. It delivers the exact 2Rx4 rank, 1.1V voltage and CL40 timing the board's memory controller expects for full-capacity recognition at rated speed.

Verified fitment and stability

The 288-pin RDIMM form factor matches the H14SHM's required registered architecture, not a UDIMM or SODIMM. Registered buffering offloads the memory controller so every populated slot runs at full capacity, while on-die ECC corrects single-bit errors to prevent silent data corruption and unplanned reboots.

Check your configuration first

Server memory support varies by model, so consult your system or motherboard manual for supported capacities, approved DIMM population order and installation steps before ordering. This module uses DDR5 technology and will not fit boards designed for other DDR generations.

How it compares

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

Price $3,604.99
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 $28.16 per GB
Pricier than about 79% 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

Other versions of this model

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Questions about this item

Will the 2Rx4 registered DIMM layout ever require a firmware or slot-order change as the Supermicro H14SHM ages?

The 2Rx4 registered design follows the board's population rules; any slot-order guidance comes from the motherboard manual, not the memory module itself.

What thermal limit appears first when the 1.1V DDR5 4800 kit runs continuously in a fully populated server?

The modules have no heat spreader, so case airflow must keep the DRAM within JEDEC operating temperature; the first limit is chassis cooling capacity.

How much power does the 128GB DDR5 4800 CL40 kit draw per module during all-day registered ECC operation?

At 1.10 V the registered ECC DIMM draws only the current required for its 4800 MT/s data rate; exact wattage depends on workload and motherboard voltage regulation.

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