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Twelve green DDR5 RDIMM modules in a row, no heat spreaders

NEMIX RAM

NEMIX RAM 1.5TB DDR5 4800 CL40 12x128GB ECC RDIMM Supermicro H14SSF memory upgrade

SKU CH-JWD8-FG68J

1.5 TB DDR5-4800 ECC registered RDIMM kit of twelve 128 GB modules for Supermicro H14SSF servers

  • Total capacity1.5 TB (12 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 1.5TB 12X128GB

Show 24 more
  • 5 TB capacity from twelve 128 GB modules maximises the Supermicro H14SSF memory limit
  • DDR5 4800 speed with CL40 latency delivers rated throughput without down-clocking
  • Registered ECC architecture offloads the controller and corrects single-bit errors on the fly
  • 2Rx4 organisation and 1.1 V operation match the board's population rules exactly
  • 288-pin RDIMM form factor fits the server slots — no UDIMM or SODIMM confusion

Exact-match server kit

This NEMIX RAM kit delivers 1.5TB across twelve 128GB DDR5 RDIMMs. Each module runs at 4800 MT/s with CL40 latency at 1.1V. The 2Rx4 registered ECC design matches the Supermicro H14SSF memory controller requirements for full-capacity recognition.

For fully populated H14SSF builds

Suits administrators filling every DIMM slot on a compatible Supermicro H14SSF motherboard with registered ECC memory. Not for systems that require unbuffered UDIMMs, SODIMM form factors, or non-ECC operation. Verify your manual for approved population order before installation.

Sustained registered ECC stability

Registered buffering offloads the memory controller so all twelve slots operate at rated speed under continuous load. ECC corrects single-bit errors in real time, preventing silent data corruption during long-running workloads. The 1.1V operating voltage maintains efficiency throughout extended operation.

How it compares

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

Price $46,695.99
Pricier than about 95% of the 21,161 comparable items (median $397.99).
Total capacity 1.5 TB (12 × 128 GB)
Higher than about 97% of the 20,941 comparable items (median 32 GB).
Price per GB $31.13 per GB
Pricier than about 89% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-724K12
Total capacity1.5 TB (12 × 128 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 items1.5 TB 12 × 128 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

Do I need a Supermicro H14SSF motherboard with 12 free 288-pin DDR5 RDIMM slots to use this 1.5 TB kit?

Yes — the kit is built for that board and requires all 12 slots to reach the full 1.5 TB capacity.

Will my existing DDR5 RDIMMs run at 4800 MT/s alongside these CL40 2Rx4 modules?

The board will clock every installed module to the lowest common speed; populate slots per the manual to keep the kit at its rated 4800 MT/s.

How can I confirm the kit is recognised at 1.5 TB with ECC active after installation?

Check the BIOS memory summary or run dmidecode — it should show 12 × 128 GB Registered ECC DIMMs at 4800 MT/s with zero correctable errors.

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