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Six green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 ECC RDIMM SuperMicro X13SEM-F X13SEM-TF memory upgrade

SKU CH-GM6E-FCSKY

A 768GB DDR5 ECC RDIMM kit of six 128GB modules running at 4800MT/s CL40 for SuperMicro X13SEM-F and X13SEM-TF servers

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from six 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces server power draw
  • Validated for SuperMicro X13SEM-F and X13SEM-TF platforms

Capacity & Compatibility

This 768GB kit contains six 128GB DDR5 4800 CL40 ECC RDIMM modules built for SuperMicro X13SEM-F and X13SEM-TF servers. Registered buffering and on-die ECC protect data integrity in multi-socket workloads. The 288-pin form factor matches the platform's memory slots exactly.

Sustained Load Behaviour

Modules run at 1.1V with Samsung, Micron or Hynix DRAM and are stress-tested under load before shipping. The 4Rx4 organisation spreads traffic across ranks, helping maintain throughput during long compute or virtualisation sessions. Registered signalling reduces electrical load on the memory controller.

Upgrade Context

The kit replaces lower-capacity RDIMM sets or fills empty slots on X13SEM-F and X13SEM-TF boards to reach the platform maximum. The jump is worth it when memory pressure limits VM density, in-memory databases or large dataset processing. No heat spreaders are fitted, so airflow must follow the server vendor's guidelines.

How it compares

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

Price $21,368.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $27.82 per GB
Pricier than about 78% 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 ECC RDIMM Registered Server Memory
Part numberMR38400-744K6
Total capacity768 GB (6 × 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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items768 GB (6 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How much heat does the 768 GB kit generate when the server runs continuously at 4800 MT/s?

Each 128 GB RDIMM operates at 1.1 V without a heat spreader, so total power draw scales with six modules under sustained DDR5 4800 load.

What must the SuperMicro X13SEM-F or X13SEM-TF already have to accept this 6 x 128 GB kit?

The board needs six free 288-pin DDR5 RDIMM slots and a BIOS that supports 4Rx4 registered ECC modules at PC5-38400 speed.

Will these CL40 4Rx4 modules work alongside any existing DDR5 RDIMMs already installed in the same server?

Mixing is possible only if the installed DIMMs are also DDR5 4800 ECC registered 4Rx4 at 1.1 V; otherwise the memory controller will down-clock or disable the mismatched ranks.

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