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Six green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 768GB (6 x 128GB) DDR5 4800 PC5-38400 CL40 1.1V 4Rx4 ECC RDIMM server RAM

SKU CH-ZG6S-GWWYZ

A 768 GB DDR5 kit of six 128 GB registered ECC RDIMMs running at 4800 MT/s CL40 for Dell PowerEdge R7615 servers

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 768 GB total capacity from six 128 GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered RDIMM design detects and corrects data errors
  • Low 1.1 V operation reduces server power draw
  • Validated for Dell PowerEdge R7615 rack server compatibility

Dell PowerEdge R7615 compatible kit

This 768GB kit contains six 128GB DDR5 4800 RDIMM modules built for the Dell PowerEdge R7615 rack server. Registered ECC operation and 4Rx4 organisation provide the data integrity and density required for virtualisation hosts and database tiers. The 1.1V voltage matches the platform's native DDR5 specification. IT teams can populate all twelve slots with two kits for maximum capacity.

Thermals and power in normal use

Registered buffers and on-die ECC logic spread the electrical load across each 128GB module, keeping per-DIMM power modest at the standard 1.1V rail. Passive operation without heat spreaders relies on the server's directed airflow, so acoustic output stays at chassis-fan level. The CL40 latency at 4800 MT/s delivers predictable bandwidth for typical enterprise workloads without elevating memory-controller voltage.

Behaviour under sustained load

Stress testing validates stability when all six modules run continuously at PC5-38400 throughput, ensuring error correction remains active during extended compute jobs. The 4Rx4 rank structure maintains signal integrity across full-rank population, preventing the throttling that can appear with denser unbuffered alternatives. System firmware manages refresh cycles automatically, so performance stays consistent throughout multi-hour processing windows.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $21,127.99
Pricier than about 93% of the 6,523 comparable items (median $188.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 6,064 comparable items (median 32 GB).
Price per GB $27.51 per GB
Pricier than about 89% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Series Server Memory
Model nameDell Compatible DDR5 ECC Registered RDIMM
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
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

How do I install the six 128GB DDR5 4800 RDIMMs in a Dell PowerEdge R7615, and which step is often missed?

Power down the server, open the chassis, align each 288-pin module with the correct DIMM slots per the R7615 memory population guide, press firmly until both latches click, then verify all 768GB appear in the BIOS before booting the OS.

What maintenance or replacement will this 4Rx4 ECC registered kit need over time?

The modules have no heat spreaders and no moving parts, so routine maintenance is limited to keeping server airflow clean; replacement is only required if a module fails ECC correction or the system logs correctable error thresholds.

What limit appears first when this 1.1V CL40 kit runs sustained workloads on the R7615?

The memory controller’s maximum supported speed of 4800 MT/s and the fixed CL40 latency set the performance ceiling; sustained throughput cannot exceed the PC5-38400 bandwidth regardless of load duration.

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