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Six green DDR5 RDIMM modules without heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 4Rx4 1.1V ECC RDIMM Cisco UCS C240 M7 memory upgrade

SKU CH-0DA8-80199

Six 128 GB DDR5 modules deliver 768 GB of registered ECC memory at 4800 MT/s CL40 for the Cisco UCS C240 M7

  • 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 MT/s speed with PC5-38400 bandwidth
  • ECC registered RDIMM for data integrity
  • 1 V operating voltage for efficient power use
  • 288-pin 4Rx4 design compatible with Cisco UCS C240 M7

Cisco UCS C240 M7 memory kit

This 768 GB kit contains six 128 GB DDR5 4800 registered ECC RDIMMs built for the Cisco UCS C240 M7 rack server. The modules run at 1.1 V with a CL40 latency and 4Rx4 organisation to support dense virtualisation and database workloads.

Registered ECC RDIMM advantage

Registered buffering and on-die ECC protect data integrity under sustained load while the 4Rx4 layout maximises capacity per channel. No heat spreaders are fitted so airflow in the server chassis remains unrestricted.

Slot population and compatibility

Installation follows the server manual slot order; all six modules must match to avoid mixed-rank errors. Builders needing a different total capacity or a non-Cisco platform should choose another kit.

How it compares

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

Price $21,252.99
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 $27.67 per GB
Pricier than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineCisco Server Compatible Series Memory
Model nameCisco 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 systemsCisco
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

Will the 4Rx4 ECC RDIMM modules need any firmware updates or spare DIMMs kept on hand for the Cisco UCS C240 M7?

The kit ships as six 128 GB modules at 1.1 V with CL40 latency; no firmware updates are required and spare DIMMs are only needed if you plan future capacity expansion.

Which limit appears first when the 768 GB kit runs sustained workloads in the Cisco UCS C240 M7?

The memory controller tops out at DDR5 4800 MT/s, so bandwidth saturates before the 1.1 V power envelope or the 4Rx4 rank structure becomes a bottleneck.

How much heat and fan noise should I expect from the six 288-pin RDIMMs operating all day in the Cisco UCS C240 M7?

Each module draws 1.1 V with no heat spreader; the server’s existing airflow handles the thermal load, adding negligible extra fan noise during continuous operation.

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