We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green DDR5 RDIMM sticks, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM 512GB (4x128GB) DDR5 4800 CL40 ECC RDIMM Dell Precision 7875 memory upgrade

SKU CH-WDN4-69XEB

512 GB DDR5 ECC registered server memory kit in four 128 GB modules at 4800 MT/s CL40 for the Dell Precision 7875

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed for high-throughput workloads
  • ECC registered design protects data integrity
  • 10 V operation reduces power draw
  • Validated for Dell Precision 7875 workstations

System-Specific 512GB DDR5 Kit

This 512GB kit contains four 128GB DDR5 4800 CL40 ECC registered DIMMs built for the Dell Precision Workstation 7875. The modules run at 1.1V and use a 288-pin form factor with 4Rx4 organisation. They are intended for IT professionals who need maximum registered ECC capacity in that specific workstation.

Suits Dell Precision 7875 upgrades only

The kit is validated for the Dell Precision 7875 and will not fit other platforms that require unbuffered memory, different pin counts or non-ECC modules. Buyers who need memory for consumer motherboards, laptops or servers with other qualified vendor lists should look elsewhere.

Registered ECC with 4Rx4 organisation

The 4Rx4 rank configuration and registered ECC design are the decisive specifications for compatibility with the Precision 7875 memory controller. Systems that do not support registered ECC or 4Rx4 modules will not recognise or stabilise with this kit.

How it compares

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

Price $14,834.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $28.97 per GB
Pricier than about 82% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K4
Total capacity512 GB (4 × 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 items512 GB (4 × 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 do I install the four 128 GB DDR5 RDIMM modules in a Dell Precision 7875, and what step is often missed?

Power down, open the chassis, align each 288‑pin module with the keyed slot and press until the ejector clips lock; the step often missed is populating all four channels in the order shown in the system service manual so the 512 GB kit runs at 4800 MT/s with ECC active.

What maintenance or replacement will the 4Rx4 registered ECC kit need over its service life?

The modules have no heat spreaders and run at 1.1 V, so the only recurring task is keeping the workstation’s internal airflow clean; if a module ever fails the lifetime replacement warranty covers a direct swap of the faulty 128 GB stick.

What limit appears first when the 512 GB kit runs sustained workloads at 4800 MT/s CL40?

The CL40 latency at DDR5‑4800 sets the throughput ceiling; once the memory controller saturates the four registered ranks, bandwidth plateaus before thermal throttling becomes a factor at the standard 1.10 V operating voltage.

More in Model-Specific Memory Upgrades

Similar items