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Four green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 4800 ECC Registered RDIMM 512GB (4x128GB) CL40 1.1V 2Rx4 Supermicro H14DSG-OD memory upgrade

SKU CH-BZN3-HRNSK

512 GB DDR5 4800 ECC registered RDIMM kit in four 128 GB modules at CL40 and 1.1 V, validated for the Supermicro H14DSG-OD motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

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  • 512 GB total capacity from four 128 GB modules
  • DDR5-4800 speed with CL40 latency at 1.1 V
  • Registered ECC RDIMM architecture for full-slot stability
  • 288-pin 2Rx4 form factor matched to Supermicro H14DSG-OD
  • Lifetime replacement warranty with US-based technical support

Target server upgrade

This 512GB kit delivers four 128GB DDR5 4800 Registered ECC RDIMMs built for the Supermicro H14DSG-OD motherboard. Each module runs at 1.1V with CL40 timing and a 2Rx4 organisation, matching the board's memory-controller requirements exactly. It is intended for administrators who need maximum supported capacity in every slot. Buyers who want unbuffered UDIMMs or non-ECC memory will not be able to use this kit.

Sustained-load behaviour

Registered buffering reduces electrical load on the memory controller so all four slots operate at the rated 4800 MT/s when fully populated. ECC corrects single-bit errors on the fly, preventing silent data corruption during long compute runs. The 1.1V operating voltage keeps power draw stable under continuous utilisation. Systems that require higher frequencies or lower latencies than CL40 will not reach those targets with this memory.

Replaces smaller RDIMM sets

The kit supersedes lower-capacity Registered DDR5 kits that leave DIMM slots empty or force mixed-rank populations. Moving to four 128GB modules fills the board's validated configuration and unlocks the full 512GB ceiling without population compromises. The jump is worth it when workloads demand the maximum addressable memory the platform supports. Servers limited to smaller DIMM densities or different form factors cannot accept this upgrade.

How it compares

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

Price $16,434.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $32.10 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 numberMR38400-724K4
Total capacity512 GB (4 × 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 items512 GB 4 × 128 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

Does the 1.10V DDR5 kit run hotter than standard voltage modules when the Supermicro H14DSG-OD is fully loaded 24/7?

Operating at the standard DDR5 voltage of 1.10V, these registered DIMMs draw no more power than the JEDEC baseline, so thermal output stays within normal server specifications even with all four slots populated continuously.

Will the Supermicro H14DSG-OD motherboard recognise the full 512GB capacity without a BIOS update?

The kit is validated for the H14DSG-OD and matches the board's required 288-pin RDIMM form factor, 2Rx4 rank structure and CL40 timing, allowing the memory controller to initialise all 512GB at the rated 4800 MT/s speed.

Can I mix these 128GB 2Rx4 RDIMMs with smaller DDR5 modules already installed in the H14DSG-OD?

Registered ECC DIMMs of different capacities or ranks cannot be mixed in the same channel; the Supermicro population rules require identical modules per channel, so the existing memory would need to be replaced by this matched 4x128GB kit.

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