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Green circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 2Rx4 1.1V ECC RDIMM Supermicro X14SDV-20C-SP3F memory upgrade

SKU CH-EMRV-T2XG2

128GB DDR5 4800 ECC RDIMM, CL40, 1.1V, 2Rx4, 288-pin, validated for Supermicro X14SDV-20C-SP3F

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

Size 128GB

  • 128 GB capacity lets the X14SDV-20C-SP3F reach its maximum supported memory
  • DDR5 4800 speed matches the board's rated frequency for full-performance operation
  • CL40 latency and 1.1 V voltage meet the exact timing and power spec the controller expects
  • Registered ECC 2Rx4 design offloads the memory controller and corrects single-bit errors on the fly
  • 288-pin RDIMM form factor is the precise module type required by this Supermicro motherboard

Supermicro X14SDV-20C-SP3F memory upgrade

This 128GB DDR5 RDIMM kit is built for the Supermicro X14SDV-20C-SP3F motherboard. It delivers registered ECC memory with a 2Rx4 organisation at 1.10V. The module matches the board's required 288-pin registered form factor and CL40 timing. Buyers needing unbuffered UDIMM or SODIMM modules cannot use this product.

Sustained load behaviour

Registered architecture buffers the command and address bus so every slot runs fully populated at the rated 4800 speed. ECC corrects single-bit errors on the fly, preventing silent data corruption during long compute runs. The 1.1V operation keeps power draw predictable under continuous server workloads. Builders who need higher frequencies or lower latencies than CL40 must look elsewhere.

Installation notes

The 288-pin RDIMM seats only in DDR5 RDIMM slots keyed for registered modules. Consult the Supermicro manual for the approved population order before fitting the kit. Mixing ranks or voltages will prevent the system from posting at full capacity. No heat spreader is fitted, so airflow across the module must be maintained by the chassis design.

How it compares

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

Price $3,756.99
Pricier than about 76% 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 $29.35 per GB
Pricier than about 83% 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

How much power does the 128GB DDR5 4800 CL40 2Rx4 1.1V ECC RDIMM draw when the server runs continuously?

The module operates at 1.10V, the standard DDR5 voltage for registered ECC DIMMs. Registered buffering reduces electrical load on the memory controller, so a fully populated Supermicro X14SDV-20C-SP3F stays within its normal power envelope without extra cooling.

What motherboard slot and memory population rules must the X14SDV-20C-SP3F already have to accept this 288-pin RDIMM kit?

The board needs a 288-pin DDR5 RDIMM slot and must support 2Rx4 registered ECC modules at 4800 MT/s. Check the manual for approved DIMM population order and maximum capacity per channel before installing.

Will this 128GB DDR5 4800 CL40 RDIMM work alongside older DDR5 4800 modules already installed in the X14SDV-20C-SP3F?

Yes, provided the existing modules are also DDR5 4800 registered ECC with matching rank and voltage. Mixing different speeds or ranks forces the memory controller to run all slots at the lowest common settings.

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