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Four green DDR4 RDIMM modules with gold contacts and black chips

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR4 2933MHz PC4-23400 CL21 288-Pin ECC RDIMM memory upgrade

SKU CH-J5PP-631ST

A 256 GB DDR4 registered ECC kit of four 64 GB modules running at 2933 MHz with CL21 latency for Dell Precision 7920 workstations

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 256 GB total capacity with four 64 GB modules
  • DDR4 2933 MHz speed rated at PC4-23400
  • ECC registered design detects and corrects data errors
  • Low 1.20 V operation reduces power draw
  • Validated for Dell Precision 7920 Rack/Tower Workstation

Dell Precision 7920 Compatible Memory

This 256GB kit contains four 64GB DDR4 2933MHz registered ECC RDIMM modules built for Dell Precision 7920 rack and tower workstations. The modules operate at 1.2V with CL21 latency and a 4Rx4 organisation across 288 pins.

Upgrading from smaller registered kits

Replacing lower-capacity RDIMM sets with this 256GB configuration adds the headroom needed for large datasets, virtualisation hosts and memory-bound rendering workloads. The jump is worth it when the workstation already runs registered memory and the motherboard supports 64GB per slot.

Registered DDR4 platform limits

Registered DDR4 requires a chipset and CPU that support ECC and buffered signalling; consumer platforms cannot use these modules. The 2933MHz speed is the maximum JEDEC rate for this generation, so bandwidth scales only by adding populated channels, not by higher frequencies.

How it compares

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

Price $1,692.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.61 per GB
Cheaper than about 60% 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 DDR4 2933 MHz RDIMM Registered Server Memory
Part numberMR23400-944K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (4 × 64 GB) DDR4 2933 MHz PC4-23400 4Rx4 1.2 V CL21 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 288-pin DDR4 RDIMM form factor fit the Dell Precision 7920 Rack/Tower Workstation?

Yes, the kit is built as a Dell DDR4 2933MHz RDIMM Registered Server Memory module with 288 pins, matching the Precision 7920 memory slots exactly.

What is the correct order for populating the four 64GB 4Rx4 modules during installation?

Install each 64GB module into the DIMM slots following the sequence shown in the Dell Precision 7920 owner's manual; the 4Rx4 rank layout requires that specific channel order for the system to recognise all 256GB.

When should the registered ECC RDIMM kit be replaced if correctable error counts start rising?

Replace the kit when the system logs show a sustained increase in correctable ECC errors, indicating the 4Rx4 DDR4 2933MHz modules are approaching end of reliable service life.

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