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Six green DDR5 RDIMM sticks with black chips no heat spreaders

NEMIX RAM

NEMIX RAM MR38400-744K6 768GB (6×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-D7Q1-S672F

A 768 GB DDR5 server kit of six 128 GB registered ECC RDIMMs running at 4800 MT/s with CL40 latency, built for Supermicro CloudDC SuperServer platforms

  • 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 data errors
  • 1 V operation reduces server power draw
  • Validated for Supermicro CloudDC SYS-621C-TN12R and SYS-611C-TN4R

Capacity & form factor

This NEMIX RAM kit delivers 768 GB of DDR5 memory in six 128 GB RDIMM modules. Each stick is a 288-pin registered DIMM rated at 4800 MT/s with CL40 latency and 1.10 V operation. The 4Rx4 organisation and on-die ECC suit enterprise workloads that require maximum density per channel.

Who this suits

IT teams upgrading Supermicro CloudDC SuperServer models SYS-621C-TN12R, SYS-611C-TN4R or SYS-121C-TN2R will find a validated, plug-compatible population. Buyers needing unbuffered UDIMMs, lower voltages, or consumer desktop form factors cannot use this registered server memory.

Deciding specification

The registered RDIMM interface with ECC and 4Rx4 ranking is the single attribute that determines compatibility; only motherboards designed for registered DDR5 ECC modules at 4800 MT/s can accept this kit.

How it compares

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

Price $24,569.99
Pricier than about 92% 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 $31.99 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 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 power does each 128 GB DDR5 4800 CL40 RDIMM draw at 1.1 V under sustained load?

Each module operates at 1.1 V; total kit capacity is 768 GB across six 128 GB RDIMMs.

Which Supermicro platforms must the buyer already own for this 6×128 GB kit to be compatible?

Compatible systems listed are SuperMicro CloudDC SuperServer SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R.

Will these 288-pin DDR5 ECC RDIMMs work alongside existing DDR5 RDIMMs of different capacity or rank in the same server?

The kit uses 4Rx4 organisation at DDR5 4800 CL40; mixing ranks or capacities depends on the motherboard memory population rules.

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