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Two green 288-pin DDR5 memory modules, no heat spreaders, 256GB kit

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM Dell Precision 7875 memory upgrade

SKU CH-ZK3T-MWCJF

256 GB dual-channel DDR5 ECC registered kit running at 4800 MT/s CL40 for Dell Precision 7875 workstations

  • 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 total capacity from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM protects data integrity under load
  • 1 V operation keeps power draw low
  • Validated for Dell Precision 7875 workstation compatibility

Dell Precision 7875 ECC RDIMM kit

This 256 GB kit supplies two 128 GB DDR5 4800 CL40 registered ECC modules built for the Dell Precision 7875 workstation. The 4Rx4 organisation and 1.1 V operation match the platform's qualified memory list.

Workstations needing maximum registered ECC capacity

The kit suits users who require 256 GB of registered error-correcting memory in a validated two-module configuration. Systems that cannot accept registered DIMMs, need unbuffered memory, or require speeds above 4800 MT/s should look at other solutions.

Straightforward DIMM installation

Installation follows the standard 288-pin DDR5 RDIMM procedure: power down, open the chassis, seat each module firmly until the retention clips engage, then verify the full 256 GB in BIOS. The most common issue is failing to populate the correct slots per the Dell Precision 7875 memory population rules, which can prevent the system from recognising the full capacity.

How it compares

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

Price $7,212.99
Pricier than about 83% 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 $28.18 per GB
Pricier than about 79% 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 motherboard slot and voltage does my system need for these 288-pin DDR5 4800 modules?

The kit uses 288-pin DDR5 RDIMM slots and runs at 1.1V, so the workstation must provide DDR5 registered DIMM sockets at that voltage.

Can I mix these 4Rx4 CL40 sticks with other DDR5 ECC RDIMMs of different rank or speed?

Mixing ranks or speeds is not recommended; the system will default to the slowest common timing and may disable ECC or registered features if configurations differ.

How do I confirm the full 256 GB is recognised and ECC is active after install?

Enter BIOS or UEFI on the Dell Precision 7875 and verify the memory summary shows 256 GB at 4800 MT/s with ECC status enabled.

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