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Four green DDR4 UDIMM sticks, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 2666MHz CL19 288-Pin UDIMM for Dell Precision 3930 Rack

SKU CH-K5BX-FVH2G

A 128GB kit of four 32GB DDR4 2666MHz CL19 UDIMMs built for Dell Precision 3930 Rack workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 128GB total capacity from four 32GB modules
  • DDR4 2666MHz speed rated at PC4-21300
  • CL19 CAS latency at 1.20V operating voltage
  • 288-pin UDIMM form factor fits Dell Precision 3930 Rack
  • 2Rx8 rank configuration with major OEM chipsets

Dell Precision 3930 Rack memory kit

This 128GB kit contains four 32GB DDR4 2666MHz UDIMMs built for the Dell Precision 3930 Rack workstation. The modules run at 1.20V with CL19 latency and use a 2Rx8 rank structure. They are non-ECC and unbuffered, matching the factory memory specification for this platform.

DDR4 2666MHz UDIMM practical limits

The DDR4 2666 interface caps bandwidth at the PC4-21300 level, so workloads that scale with memory throughput will hit this ceiling. Four populated slots leave no free DIMM sockets for later expansion without removing existing modules. The 2Rx8 organisation is fixed and cannot be changed to a single-rank configuration.

Straightforward slot installation

Installation follows the standard UDIMM procedure: align the 288-pin edge connector with the motherboard slot and press until the retention clips engage. No heat spreader is fitted, so clearance is minimal and cable routing is simple. The usual error is mixing these non-ECC modules with registered or ECC DIMMs, which prevents the system from posting.

How it compares

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

Price $622.99
Pricier than about 54% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.87 per GB
Cheaper than about 78% 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 2666 MHz Non-ECC Unbuffered UDIMM
Part numberMD21300-328K4
Total capacity128 GB (4 × 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 items128 GB (4 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

Should I choose the 128GB kit of four 32GB modules or a different capacity for my Dell Precision 3930 Rack?

This kit provides 128GB total capacity across four 32GB modules, filling four DDR4 slots for the maximum supported density in the Precision 3930 Rack.

What does the 2666MHz speed mean for real-world performance in this workstation?

The DDR4 2666 (PC4-21300) rating sets the maximum data rate the memory controller will run at; in the Precision 3930 Rack it operates at 2666MHz with CL19 latency at 1.2V.

Is this 288-pin UDIMM compatible with the Dell Precision 3930 Rack's memory standard?

Yes, the 288-pin DDR4 UDIMM form factor matches the Precision 3930 Rack's unbuffered non-ECC DDR4 slots, and the 2Rx8 organisation is supported by the platform.

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