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Two green DDR5 RDIMM modules with black chips and gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400 CL52 ECC RDIMM Dell XE9685L

SKU CH-TZJW-SEWMK

A 256 GB DDR5 ECC RDIMM kit with two 128 GB modules at 6400 MHz CL52 for Dell PowerEdge XE9685L servers

  • Total capacity256 GB (2 × 128 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank4Rx4

Size 256GB 2X128GB

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Speed 6400MHz

  • 256GB kit expands server capacity with two 128GB modules
  • DDR5 6400 speed feeds data-intensive workloads at 1.1V
  • CL52 latency keeps registered timing tight under load
  • ECC RDIMM corrects single-bit errors for data integrity
  • Built for Dell PowerEdge XE9685L rack server compatibility

Dell PowerEdge XE9685L memory kit

This NEMIX RAM kit supplies 256 GB across two 128 GB DDR5 ECC RDIMM modules built for the Dell PowerEdge XE9685L rack server. Each module runs at 6400 MHz with a CL52 latency and operates at 1.1 V. The registered 4Rx4 design uses major OEM DRAM chips to deliver error-correcting reliability in a 288-pin form factor.

Suited for IT teams expanding capacity in a Dell

Administrators who need registered ECC memory validated for this specific server will find the kit matches the platform's requirements. Buyers who want more storage or who need unbuffered DIMMs for a workstation should look at a different product line.

Sustained operation in a registered server

The registered buffer and ECC circuitry maintain data integrity during continuous workloads on the Dell PowerEdge XE9685L. Modules operate at the specified 1.1 V without a heat spreader, relying on the server's directed airflow for thermal management. The 4Rx4 organisation supports high-density population across the platform's memory channels.

How it compares

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

Price $9,151.99
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 $35.75 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 numberMR51200-744K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (2 × 128 GB) DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the Dell PowerEdge XE9685L need a specific BIOS revision before it will recognise the 256 GB DDR5 6400 CL52 ECC RDIMM kit?

The kit is built to Dell XE9685L specifications at 6400 MHz CL52 with 1.1 V registered ECC modules. Dell servers normally validate memory at POST, so a current BIOS is recommended, but no special revision is named in the compatibility data.

Can I mix these 128 GB 4Rx4 DDR5 6400 RDIMMs with existing 64 GB DDR5 modules in the same XE9685L?

Each module in this kit is a 128 GB 4Rx4 registered DIMM running at 6400 MHz CL52 1.1 V. Mixing different ranks or capacities on the same channel can force the memory controller to down-clock or disable ECC, so Dell’s memory population rules should be followed.

After installation, how do I confirm the XE9685L is running the full 256 GB at 6400 MT/s with ECC active?

Enter the system BIOS or iDRAC interface and check the memory configuration screen. It should show 256 GB total, 6400 MT/s operating speed, registered ECC enabled, and both 128 GB 4Rx4 DIMMs present on the correct channels.

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