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Four green DDR5 UDIMM modules in a kit

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR5 4800 CL40 1.1V 2Rx8 UDIMM SuperMicro SYS-531AD-I C9Z790-CG

SKU CH-X4DE-9FED1

A 128GB kit of four 32GB DDR5 4800 CL40 1.1V 2Rx8 unbuffered UDIMM modules validated for SuperMicro SYS-531AD-I C9Z790-CG systems

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 128GB 4X32GB

  • 128 GB total capacity from four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • Low 1.1 V operating voltage for efficient power draw
  • CL40 CAS latency with 2Rx8 dual-rank organisation
  • Validated for SuperMicro SYS-531AD-I and C9Z790-CG systems

System-Specific DDR5 Kit

This 128 GB kit contains four 32 GB DDR5 UDIMMs built for the SuperMicro SYS-531AD-I C9Z790-CG workstation. It targets IT professionals and builders who need a validated, plug-in memory upgrade for that exact platform.

4800 MT/s CL40 at 1.1 V

The modules run at DDR5 4800 (PC5-38400) with a CAS latency of 40 and a default voltage of 1.10 V. That speed and voltage combination is the single spec that determines whether the kit will operate correctly in the qualified system.

Sustained-Load Stability

Every module is stress-tested under continuous load before shipment to verify error-free operation during long render, compile or virtualisation sessions. The 2Rx8 unbuffered design maintains consistent throughput without the latency overhead of registered DIMMs.

How it compares

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

Price $1,742.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $13.62 per GB
Pricier than about 60% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz Non-ECC Unbuffered UDIMM
Part numberMD38400-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 UDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Other versions of this model

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Questions about this item

Will the DDR5 4800 speed and CL40 latency run at full rate on the SuperMicro SYS-531AD-I C9Z790-CG?

The kit is validated for the SYS-531AD-I C9Z790-CG, so the four 32 GB modules will operate at DDR5 4800 with CL40 timings on that platform.

Does the PC5-38400 rating limit bandwidth on the C9Z790-CG motherboard?

PC5-38400 is the peak transfer rate of DDR5 4800; the C9Z790-CG memory controller supports that rate, so the full bandwidth is available.

Will the 288-pin UDIMM modules fit the four DIMM slots on the SYS-531AD-I?

Yes, each 288-pin DDR5 UDIMM matches the desktop DIMM slots on the SYS-531AD-I, and the kit provides four modules for a full 128 GB population.

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