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Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400 CL52 1.1V ECC RDIMM 2Rx4 Supermicro H14SSL-NT memory upgrade

SKU CH-HZ0E-34DRY

256 GB DDR5 ECC RDIMM kit runs at 6400 MHz with CL52 timing for Supermicro H14SSL-NT servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth on compatible boards
  • Registered ECC architecture corrects single-bit errors to prevent silent data corruption
  • 1 V operation matches the Supermicro H14SSL-NT memory controller specification
  • 288-pin RDIMM form factor fits the exact slot type required by the motherboard

Supermicro H14SSL-NT DDR5 upgrade

This 256 GB kit is built specifically for the Supermicro H14SSL-NT motherboard. It delivers two 128 GB DDR5 6400 registered ECC RDIMMs that the board recognises at full capacity and rated speed without manual tuning. System administrators deploying memory-intensive workloads on this platform receive a drop-in upgrade that matches the controller's exact rank, voltage and timing requirements. Builders using other motherboards or consumer platforms cannot use these modules.

Registered ECC architecture and 2Rx4 layout

Registered buffering offloads the memory controller so every slot runs fully populated at the specified 6400 MT/s data rate. On-die ECC detects and corrects single-bit errors in flight, preventing silent data corruption and unplanned reboots in production environments. The 2Rx4 organisation and 1.1 V operating point are the precise specifications the H14SSL-NT memory controller expects for stable operation. Systems that require unbuffered UDIMMs or non-ECC memory will not accept this kit.

256 GB capacity for dense virtualisation

Two 128 GB modules provide 256 GB of addressable memory, supporting large virtual-machine fleets, in-memory databases and high-thread-count compute jobs on a single board. The kit fills two DIMM slots at the maximum qualified density for this platform, leaving no headroom for further expansion within the same channel population rules. Workloads that exceed 256 GB or require additional DIMM slots must move to a motherboard with greater supported capacity.

How it compares

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

Price $9,341.99
Pricier than about 86% 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 $36.49 per GB
Pricier than about 90% 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 numberMR51200-724K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
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 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Will the 2Rx4 RDIMM modules need any firmware updates or re-training after installation?

The kit is an exact-match upgrade for the Supermicro H14SSL-NT, so the memory controller recognises the 2Rx4 rank, 1.10 V voltage and CL52 timing at full DDR5 6400 speed without extra steps.

What limits sustained throughput when all slots are populated on this board?

Registered ECC architecture offloads the memory controller, allowing every slot to run fully populated at the rated 6400 MT/s without down-clocking.

How much heat and power should I expect from the 256 GB kit running continuously?

Each 128 GB module operates at 1.10 V with no heat spreader; the registered design keeps per-module power low, so total heat output stays modest under 24/7 load.

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