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Two green DDR4 UDIMM sticks in static bag

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4 2666 PC4-21300 CL19 UDIMM Dell Precision 3930 Rack memory upgrade

SKU CH-8P6H-YSSF6

A 64 GB dual-channel DDR4 2666 kit of two 32 GB unbuffered UDIMMs validated for the Dell Precision 3930 Rack workstation

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 64GB total capacity across two 32GB modules for demanding workloads
  • DDR4 2666 speed with CL19 latency for responsive system performance
  • 20V operation reduces power draw and heat output
  • 288-pin UDIMM form factor fits Dell Precision 3930 Rack workstations
  • Non-ECC unbuffered design using major OEM chips for reliable compatibility

Dell Precision 3930 Rack memory kit

This 64 GB kit supplies two 32 GB DDR4 2666 UDIMMs built for the Dell Precision 3930 Rack workstation. It targets IT professionals and power users who need maximum capacity in that specific platform without registered or ECC modules. The unbuffered design keeps latency low for standard desktop workloads. Buyers requiring ECC error correction or registered signal buffering must look elsewhere.

Thermals and power profile

Each module runs at the standard 1.2 V DDR4 voltage, so power draw stays within typical unbuffered limits for 2666 MT/s operation. No heat spreader is fitted, relying on chassis airflow to keep the Samsung, Micron or Hynix ICs cool under sustained load. Noise is unaffected because the sticks add no active cooling. Systems with restricted airflow should verify case ventilation before installing a full four-module population.

Package contents and practical impact

The box delivers exactly two 288-pin 2Rx8 UDIMMs totalling 64 GB, ready for immediate installation in the validated Dell workstation. No software, drivers or configuration utilities are included or required; the memory is detected automatically at POST. The lifetime replacement warranty backs the modules against defects. Users needing capacities beyond 64 GB or speeds above 2666 MT/s will need a different platform or qualified kit.

How it compares

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

Price $324.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $5.08 per GB
Cheaper than about 76% 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 DDR4 2666 MHz Non-ECC Unbuffered UDIMM
Part numberMD21300-328K2
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR4 UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items64 GB (2 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

How do I install the 288-pin DDR4 UDIMM modules in the Dell Precision 3930 Rack and which step is often missed?

Power off and unplug the workstation, open the chassis, align each 32 GB module's notch with the slot key, press firmly until both retention clips click, then verify the firmware recognises the full 64 GB at 2666 MT/s — the step most people skip is reseating both sticks if the system only shows 32 GB on first boot.

What maintenance or replacement will the 2Rx8 unbuffered DDR4 kit need over its service life?

No scheduled maintenance is required; keep interior dust-free and ensure airflow stays unobstructed so the 1.2 V modules run within thermal limits, and replace only if a module fails — the lifetime replacement warranty covers defective units.

What limit appears first when the 64 GB kit runs sustained workloads at CL19 2666 MT/s?

The DDR4 2666 bandwidth ceiling of PC4-21300 is reached before voltage or thermal throttling becomes an issue, so prolonged heavy traffic maxes out throughput at the rated transfer rate rather than triggering down-clocking.

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