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Green 288-pin DDR5 RDIMM module with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 2Rx4 CL40 1.1V ECC Registered RDIMM Supermicro H14DSG-O-CPU memory upgrade

SKU CH-R16W-W95AB

128 GB DDR5 4800 Registered ECC RDIMM at CL40 and 1.1 V, validated for Supermicro H14DSG-O-CPU 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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  • 128GB capacity expands server memory for heavy workloads
  • DDR5 4800 speed delivers rated bandwidth for H14DSG-O-CPU
  • Registered ECC architecture corrects single-bit errors automatically
  • CL40 latency with 1.1V operation matches controller spec exactly
  • 288-pin RDIMM form factor fits motherboard memory slots precisely

Supermicro H14DSG-O-CPU DDR5 upgrade

This 128GB DDR5 4800 RDIMM is built for the Supermicro H14DSG-O-CPU motherboard. Registered ECC architecture meets the board's population rules so every slot is recognised at full capacity. Server administrators who need validated, single-part-number compatibility for this platform can deploy without guessing. Builders using other Supermicro boards or non-RDIMM slots should verify their manual first.

128GB CL40 1.1V registered headroom

The module runs at DDR5 4800 (PC5-38400) with CL40 latency at 1.1V. Registered buffering offloads the memory controller, allowing full-slot populations to operate at rated speed while ECC corrects single-bit errors on the fly. Workloads that exceed 128GB per DIMM or require lower latency than CL40 will need a different module specification.

288-pin RDIMM form factor fit

The 288-pin Registered DIMM fits only motherboards wired for DDR5 RDIMMs with matching population rules. It frees the builder from mixing ranks or voltages because the part matches the H14DSG-O-CPU's validated configuration. Systems that accept only UDIMM, SODIMM or earlier DDR generations cannot use this module.

How it compares

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

Price $3,563.99
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 $27.84 per GB
Pricier than about 78% 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 this 128GB DDR5 4800 CL40 RDIMM run at rated speed in a Supermicro H14DSG-O-CPU alongside existing DDR5 modules?

Yes, provided the existing modules are also DDR5 4800 Registered ECC RDIMMs with matching 1.1V voltage and CL40 timing; mixed speeds or ranks will force the system to run at the lowest common settings.

How can I confirm the module is recognised at full 128GB capacity and correct CL40 timing after installation?

Check the BIOS memory information page or run a tool such as dmidecode; it should report 128GB, DDR5 4800, 2Rx4 Registered ECC, 1.1V and CAS latency 40.

Does the package include only the 128GB DDR5 4800 RDIMM or are extra items such as a heat spreader supplied?

The box contains the 128GB DDR5 4800 2Rx4 CL40 1.1V 288-pin ECC Registered RDIMM only; no heat spreader or additional accessories are included.

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