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Twelve green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 1.5TB 12x128GB DDR5 6400 CL52 1.1V 4Rx4 ECC RDIMM Dell XE9685L

SKU CH-8XNJ-H2QK1

A 1.5 TB registered ECC DDR5 kit of twelve 128 GB modules at 6400 MHz CL52, built for the Dell PowerEdge XE9685L rack server

  • Total capacity1.5 TB (12 × 128 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank4Rx4

Size 1.5TB 12X128GB

Show 6 more

Speed 6400MHz

  • 5 TB total capacity supports large workloads with 12 modules of 128 GB each
  • DDR5 6400 MT/s speed delivers high bandwidth for server tasks
  • CL52 latency provides responsive data access at rated frequency
  • 1 V operation reduces power draw per module
  • ECC RDIMM registered design ensures data integrity and signal stability

1.5TB DDR5 Kit for Dell XE9685L

This 1.5TB registered DDR5 kit contains twelve 128GB ECC RDIMM modules rated at 6400MHz with CL52 latency. It is built for the Dell PowerEdge XE9685L rack server and operates at 1.1V using 288-pin 4Rx4 components.

Not for non-Dell platforms or unbuffered slots

Buyers who need memory for a different server model or a workstation that accepts only unbuffered UDIMMs cannot use this kit. Systems that require a lower module count or a different rank configuration should look elsewhere.

4Rx4 registered ECC DDR5 at 6400MHz

The decisive specification is the 4Rx4 registered ECC DDR5 organisation running at 6400MHz with CL52 timing. Confirm that the Dell PowerEdge XE9685L motherboard supports this exact rank and speed before ordering.

How it compares

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

Price $48,195.99
Pricier than about 96% of the 21,161 comparable items (median $397.99).
Total capacity 1.5 TB (12 × 128 GB)
Higher than about 97% of the 20,941 comparable items (median 32 GB).
Price per GB $32.13 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 numberMR51200-744K12
Total capacity1.5 TB (12 × 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 items1.5 TB (12 × 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

Will the 6400MHz CL52 4Rx4 modules run with existing DDR5 RDIMMs already installed in my PowerEdge XE9685L?

All 12 modules in this kit are matched for 6400MHz CL52 4Rx4 operation at 1.1V; mixing with other DDR5 RDIMMs is only supported if the other modules share the same speed, latency, rank and voltage.

How can I verify the kit is operating at 6400MHz CL52 with ECC active after installation?

Enter the system BIOS or iDRAC and confirm the reported memory speed shows 6400MHz, CAS latency reads CL52, total capacity reads 1.5TB and ECC status is reported as enabled.

Does the MR51200-744K12 package include any heat spreaders, cables or a USB key, or just the 12 RDIMMs?

The package contains only the 12 x 128GB 288‑pin DDR5 ECC RDIMMs; no heat spreaders, cables or additional accessories are included.

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