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

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 ECC RDIMM CL40 1.1V Dell PowerEdge XE9680 memory upgrade

SKU CH-8NRK-AC6SN

Adds 256 GB of DDR5 4800 ECC registered memory in two 128 GB modules for Dell PowerEdge XE9680 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB capacity with two 128 GB modules for dense server workloads
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered design with CL40 latency protects data integrity
  • 1 V operation reduces power draw in Dell PowerEdge XE9680
  • 288-pin 4Rx4 RDIMM form factor fits compatible Dell server slots

Dell PowerEdge XE9680 memory kit

This 256 GB kit contains two 128 GB DDR5 modules built for the Dell PowerEdge XE9680 server. It targets IT teams expanding memory capacity in that specific platform. Buyers needing a different form factor, a non-ECC module or a lower-density kit should look elsewhere.

Registered ECC with 4Rx4 organisation

Each module runs at 4800 MT/s (PC5-38400) with CL40 latency at 1.1 V. The 4Rx4 rank layout and registered buffer are required by the XE9680 memory controller; unbuffered or different-rank DIMMs will not function in this system.

Tool-free installation in the server chassis

The 288-pin RDIMMs slot directly into the XE9680 memory bays following the population order in the Dell service manual. A common error is mixing these 4Rx4 modules with other ranks or leaving empty slots in the wrong sequence, which prevents the system from posting.

How it compares

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

Price $8,448.99
Pricier than about 85% 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 $33.00 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 lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K2
Total capacity256 GB (2 × 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 systemsDell
In the box
Included items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What does the 4800 MT/s speed deliver in a Dell PowerEdge XE9680?

The modules run at the platform's standard DDR5 4800 data rate, providing the full PC5-38400 bandwidth the server's memory controller expects.

How does the registered ECC design affect error handling and signal integrity?

Registered buffering reduces electrical load on the memory bus, while ECC detects and corrects single-bit errors for continuous data integrity.

Will the 288-pin 4Rx4 RDIMMs fit the XE9680 memory slots without a heat spreader?

Yes, the bare 288-pin RDIMM form factor matches the server's DDR5 slots and the 4Rx4 organisation is supported by the platform.

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