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Four green DDR5 RDIMM modules without heat spreaders in a clear plastic tray

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade for Supermicro H14SSL-N

SKU CH-EM0V-2FXYM

Adds 128 GB of DDR5 ECC registered memory in a matched four-module kit for Supermicro H14SSL-N servers

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

Size 128GB 4X32GB

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  • 128 GB total capacity from four 32 GB modules
  • DDR5 4800 speed with CL40 latency for rated performance
  • ECC and registered design corrects errors and buffers signals
  • 1 V operation matches the platform's voltage requirement
  • Verified compatibility with the Supermicro H14SSL-N motherboard

128GB DDR5 ECC RDIMM Kit

This 128GB kit contains four 32GB DDR5 4800 registered ECC RDIMMs built for the Supermicro H14SSL-N motherboard. Each module runs at 1.1V with CL40 timing and a 2Rx8 organisation. The registered design lets the memory controller drive all four slots at the rated speed without signal degradation.

DDR5 4800 Registered Limits

DDR5 4800 sets the maximum transfer rate at 4800 MT/s and the registered buffer adds one cycle of latency to every command. The motherboard's memory population rules decide which slots must be filled first and whether mixing ranks is allowed. Exceeding the board's qualified capacity or population order will prevent the system from posting at the rated frequency.

Installing Four RDIMMs

Align the 288-pin edge connector with the keyed slot and press down evenly until both retention clips lock. The registered buffer makes the modules slightly taller than unbuffered DIMMs so verify CPU cooler clearance before seating all four. A common issue is populating slots in the wrong order; follow the H14SSL-N manual's population sequence exactly or the system will not recognise the full 128GB.

How it compares

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

Price $3,876.99
Pricier than about 76% 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 $30.29 per GB
Pricier than about 86% 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 numberMR38400-328K4
Total capacity128 GB (4 × 32 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 rank2Rx8
Heat spreaderNo
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 288-PIN ECC RDIMM KIT

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Questions about this item

Should I choose the 4×32 GB kit or a different capacity for the Supermicro H14SSL-N?

The 4×32 GB kit gives 128 GB total and matches the board's population rules for full-speed operation across all four slots.

What does the DDR5-4800 rating mean once the modules are installed in the server?

The memory controller will run the kit at 4800 MT/s with CL40 timings at 1.10 V, delivering the rated bandwidth without manual tuning.

How does the 288-pin RDIMM interface and registered design affect real-world use?

The registered buffer lets all four slots run fully populated at 4800 MT/s, while ECC corrects single-bit errors to prevent silent data corruption.

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