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

NEMIX RAM

NEMIX RAM 512GB (4×128GB) DDR5 4800 ECC RDIMM CL40 1.1V Supermicro H13DSG-O-CPU-D

SKU CH-CWFE-DDGEN

512 GB DDR5 server kit with four 128 GB registered ECC RDIMMs at 4800 MT/s, CL40, 1.1 V, validated for the Supermicro H13DSG-O-CPU-D 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

Show 30 more
  • 512 GB total capacity lets your Supermicro server handle massive datasets with four 128 GB modules
  • DDR5 4800 speed feeds the CPU fast enough for memory-bound workloads at rated frequency
  • Registered ECC design corrects single-bit errors on the fly to prevent silent data corruption
  • 10 V operation keeps power draw low while running every slot fully populated
  • 288-pin RDIMM form factor matches the H13DSG-O-CPU-D motherboard exactly for guaranteed fit

Capacity and purpose

This 512 GB kit delivers four 128 GB DDR5 registered ECC RDIMMs built for the Supermicro H13DSG-O-CPU-D motherboard. Each module runs at 4800 MT/s with CL40 timing at 1.1 V and a 2Rx4 organisation, giving the memory controller the exact rank, voltage and timing it expects for full-capacity recognition.

Sustained-load behaviour

Registered buffering offloads the memory controller so every slot remains stable when fully populated, while on-die ECC corrects single-bit errors during continuous operation. The 1.1 V operating voltage keeps power draw consistent across long workloads without thermal throttling or voltage drift.

Installation notes

The 288-pin RDIMM form factor fits only the registered DIMM slots on the target board; it will not seat in UDIMM or SODIMM sockets. Population order and maximum supported capacity vary by BIOS revision, so the system or motherboard manual must be consulted 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 $15,888.99
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 $31.03 per GB
Pricier than about 89% 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

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Questions about this item

Does the 1.1 V DDR5 4800 kit draw significantly more power or run hotter than lower-capacity RDIMMs when the server runs 24/7?

Each 128 GB module operates at the standard 1.1 V DDR5 voltage, so power draw scales with capacity rather than exceeding the platform's thermal design for registered DIMMs.

What must the motherboard provide for this 4 × 128 GB kit to be recognised at full capacity?

The Supermicro H13DSG-O-CPU-D must support 288-pin DDR5 RDIMM slots, registered ECC operation, 2Rx4 rank structure and DDR5-4800 speed with CL40 timing.

Can I mix these 2Rx4 registered DDR5 modules with any existing DDR5 RDIMMs of a different rank or speed on the same board?

Mixing ranks or speeds is not recommended; the memory controller expects identical 2Rx4 DDR5-4800 CL40 modules in the populated slots for stable registered ECC operation.

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