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Eight green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 1TB (8x128GB) DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade for Dell PowerEdge XE8640

SKU CH-RBKR-2QGCC

1 TB DDR5 4800 CL40 ECC registered server memory kit with eight 128 GB 4Rx4 modules for Dell PowerEdge XE8640

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1TB total capacity across eight 128GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered RDIMM ensures data integrity under load
  • CL40 CAS latency at 1.1V operating voltage
  • 288-pin 4Rx4 configuration built for Dell PowerEdge XE8640

Dell PowerEdge XE8640 memory kit

This 1 TB kit contains eight 128 GB DDR5 RDIMM modules built for the Dell PowerEdge XE8640 rack server. It delivers registered ECC memory that matches the platform’s qualified specification.

Sustained load behaviour

Registered buffering and on-die ECC keep data integrity stable during continuous server workloads. The 1.1 V operating voltage helps limit thermal output while the modules run at the rated 4800 MT/s speed.

Deciding specification

The 4Rx4 rank organisation and CL40 latency define whether this kit fits the memory controller’s supported configuration. Verify the server’s qualified vendor list for 4Rx4 RDIMM support before ordering.

How it compares

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

Price $32,159.99
Pricier than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $32.16 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 numberMR38400-744K8
Total capacity1 TB (8 × 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 items1 TB (8 × 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 do the 1.1V 4800 MT/s modules draw under continuous server load?

Each 128GB stick runs at 1.10V DDR5 voltage; total draw depends on the XE8640 memory controller and workload, not on the modules alone.

What must the Dell PowerEdge XE8640 already have to accept this 8-module kit?

The server needs eight free 288-pin DDR5 RDIMM slots and a BIOS that supports 4Rx4 registered ECC modules at 4800 MT/s.

Can I mix these CL40 4Rx4 sticks with existing 2Rx4 or 2Rx8 modules in the same XE8640?

Dell's memory population rules for the XE8640 dictate which rank combinations are allowed per channel; check the server's technical guide before mixing.

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