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Green bare circuit board DDR5 RDIMM module with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 2Rx4 ECC RDIMM Supermicro H13DSG-O-CPU-D memory upgrade

SKU CH-WZJR-XCKWT

128 GB DDR5 4800 registered ECC RDIMM, 2Rx4 CL40 1.1 V, built for the Supermicro H13DSG-O-CPU-D motherboard

  • 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 for memory-intensive server workloads
  • Registered ECC architecture prevents silent data corruption in production
  • CL40 latency at 1.1 V matches board memory-controller requirements
  • 2Rx4 288-pin RDIMM form factor fits Supermicro H13DSG-O-CPU-D slots
  • Major OEM Samsung, Micron, Hynix chips ensure enterprise-grade stability

128GB DDR5-4800 ECC RDIMM for Supermicro H13DSG

This 128GB registered ECC module runs at DDR5-4800 with CL40 latency and 1.1V operation. It targets administrators upgrading the Supermicro H13DSG-O-CPU-D motherboard where full-capacity population and data integrity are required. The 2Rx4 organisation matches the board's memory-controller expectations exactly.

Replaces partial or mixed-capacity kits

The jump is worth it when the server currently runs fewer than the maximum supported DIMMs or mixes ranks that force the controller to downclock. A matched 2Rx4 registered kit lets every slot run at the rated 4800MT/s without manual timing adjustments and maintains ECC correction across the full 128GB.

Fits 288-pin RDIMM slots on the H13DSG-O-CPU-D

The module needs no heat spreader and draws 1.1V, so it works within the board's standard power budget. It frees the memory controller from driving unbuffered loads, allowing full-slot population while ECC handles single-bit errors transparently. Verify the manual for approved population order before installing.

How it compares

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

Price $4,168.99
Pricier than about 77% 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 $32.57 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 numberMR38400-724K1
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 this 288-pin DDR5 RDIMM fit the memory slots on my Supermicro H13DSG-O-CPU-D motherboard?

Yes, the module is a 288-pin registered DDR5 RDIMM built to the exact form factor that the Supermicro H13DSG-O-CPU-D requires; it is not a UDIMM or SODIMM and will seat correctly in the board's DDR5 slots.

What is the correct installation sequence for populating all slots with these 2Rx4 registered ECC modules?

Install the RDIMMs in the order specified by the Supermicro H13DSG-O-CPU-D manual, typically filling the primary channel slots first; the registered buffer allows full-speed operation when every slot is populated, but skipping the prescribed sequence can prevent the system from posting.

How do I know when a 128GB 2Rx4 ECC RDIMM needs replacement in a production server?

Monitor the system logs for corrected ECC events; a rising count of single-bit corrections or any uncorrectable multi-bit error reported by the BMC or OS indicates the module should be swapped before it causes downtime.

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