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Sixteen green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 512GB (16x32GB) DDR5 4800 CL40 ECC RDIMM Dell XE8640 memory upgrade

SKU CH-XMKA-2852B

A 512 GB kit of sixteen 32 GB DDR5 4800 CL40 ECC registered DIMMs built for the Dell PowerEdge XE8640

  • Total capacity512 GB (16 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity across 16 modules of 32 GB each
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered RDIMM design protects data integrity
  • 1 V operating voltage reduces power draw
  • 288-pin 2Rx8 layout fits Dell PowerEdge XE8640

Dell XE8640 512GB kit

This 16-module kit delivers 512GB of DDR5 4800 registered ECC memory built for the Dell PowerEdge XE8640 rack server. Each 32GB module runs at 1.1V with CL40 timing and 2Rx8 organisation. The kit targets IT teams expanding capacity in mission-critical enterprise workloads.

16 matched modules simplify deployment

The package supplies sixteen factory-matched 32GB RDIMMs in a single kit, removing the need to source and validate individual sticks. Matched sets reduce the risk of timing mismatches that can cause instability in large memory configurations.

Verify open DIMM slots and BIOS revision

Confirm the XE8640 chassis has sixteen free 288-pin DDR5 slots before ordering. Check Dell documentation for the minimum BIOS version that supports full 512GB population and any slot-filling rules for registered 2Rx8 modules.

How it compares

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

Price $14,571.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (16 × 32 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $28.46 per GB
Pricier than about 80% 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 numberMR38400-328K16
Total capacity512 GB (16 × 32 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 rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items512 GB (16 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 16 registered DIMMs need any periodic maintenance or replacement?

The modules are solid-state with no moving parts and carry a lifetime replacement warranty, so no scheduled maintenance or replacement is required under normal server operation.

What limit appears first when the 512GB kit runs at DDR5 4800 continuously?

The 1.10V operating voltage and CL40 latency set the thermal and timing envelope; sustained full-load use will hit the memory controller's thermal throttle point before bandwidth saturates.

How much noise, heat or power should I expect from the 16x32GB RDIMMs running all day?

Registered DDR5 RDIMMs have no fans and draw 1.1V per module; total power scales with the 16 modules, but they add no audible noise and only modest heat to the server's existing airflow.

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