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Two green 288-pin DDR5 RDIMM modules, no heat spreaders, 256GB kit

NEMIX RAM

NEMIX RAM 256GB (2×128GB) DDR5 4800 CL40 1.1V ECC Registered RDIMM Supermicro H14SSL-N

SKU CH-JKFY-PX3SN

256 GB kit of two 128 GB DDR5-4800 registered ECC RDIMMs running at 1.1 V CL40, validated for the Supermicro H14SSL-N motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 24 more
  • 256 GB total capacity from two 128 GB modules enables maximum server density
  • DDR5-4800 speed with CL40 timing delivers rated bandwidth for heavy workloads
  • Registered ECC design corrects single-bit errors and supports full-slot population
  • 10 V operation matches platform spec for stable, low-power performance
  • Verified compatibility with Supermicro H14SSL-N motherboard ensures correct fit and recognition

System-specific DDR5 memory kit

This 256 GB kit contains two 128 GB DDR5 RDIMMs built for the Supermicro H14SSL-N motherboard. It delivers registered ECC memory in the exact 288-pin form factor the board requires. Server administrators and integrators can populate two slots with matched modules that the firmware will recognise at full capacity.

Registered ECC with 2Rx4 organisation

The modules run at DDR5 4800 (PC5-38400) with CL40 timing at 1.1 V. Registered buffering and 2Rx4 rank organisation let the memory controller drive both DIMMs at rated speed while ECC corrects single-bit errors on the fly. This combination is the single specification that determines whether the kit will initialise correctly on the target platform.

Matched dual-module kit

The package supplies two 128 GB RDIMMs in a single kit so both modules share the same rank, voltage and timing profile. No additional accessories, cables or software are included. Buyers who need a different capacity, a UDIMM form factor or non-ECC memory should look elsewhere.

How it compares

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

Price $7,782.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $30.40 per GB
Pricier than about 87% 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 numberMR38400-724K2
Total capacity256 GB (2 × 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 items256 GB 2 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

What does the 4800 MT/s speed mean once the kit is installed in a Supermicro H14SSL-N?

The modules run at DDR5-4800 (PC5-38400) with CL40 latency at 1.1 V, delivering the rated throughput the board's memory controller expects when all slots are populated.

How does the 288-pin RDIMM interface and registered design affect what the system can use?

The 288-pin RDIMM form factor with registered buffering is required by the H14SSL-N; it allows full-capacity operation across all populated slots while ECC corrects single-bit errors on the fly.

What physical clearance and slot layout does this 2×128 GB kit need on the motherboard?

Each 288-pin RDIMM fits a standard DDR5 DIMM slot with no heat spreader, so it clears typical CPU coolers; follow the H14SSL-N manual for the approved population order.

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