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Two green DDR4 UDIMM sticks, no heat spreaders

NEMIX RAM

NEMIX RAM MD21300-618K2 32GB DDR4 2666 CL19 memory upgrade

SKU CH-ZFGB-KEZZX

32 GB dual-channel DDR4 kit at 2666 MHz CL19 for Dell Precision 3930 Rack Workstation

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 32 GB kit (2 × 16 GB) doubles desktop capacity
  • DDR4 2666 MHz PC4-21300 speed matches Dell Precision 3930 Rack spec
  • CL19 CAS latency at 1.2 V for stable operation
  • 288-pin UDIMM 1Rx8 non-ECC unbuffered design fits standard desktop slots
  • Major OEM Samsung, Micron or Hynix chips stress-tested for reliability

Dell Precision 3930 Rack Workstation Compatible

This 32GB kit contains two 16GB DDR4 2666 UDIMM modules built for the Dell Precision 3930 Rack Workstation. It targets IT professionals and power users who need to expand system memory for virtualisation, content creation or heavy multitasking. The unbuffered non-ECC design matches the workstation's standard memory architecture.

Check Your Current Configuration

Before ordering, verify that your Precision 3930 Rack Workstation has two free 288-pin DIMM slots and that the motherboard firmware supports DDR4 2666 at 1.2V. Confirm the existing modules are also non-ECC unbuffered UDIMMs running at CL19 so the new pair will operate in dual-channel mode without timing mismatches.

Kit Contents and Testing Impact

The package delivers a matched pair of 1Rx8 modules stress-tested under load for stability. No heat spreaders are included, so airflow inside the rack chassis must be adequate for bare PCBs. The lifetime replacement warranty covers the modules themselves, while the pre-validated compatibility removes the guesswork from the upgrade process.

How it compares

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

Price $177.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $5.56 per GB
Cheaper than about 69% 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 numberMD21300-618K2
Total capacity32 GB (2 × 16 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 rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items32 GB (2 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

Does the MD21300-618K2 kit include both 16GB modules or must I buy a second stick separately?

The kit ships as a matched pair of two 16GB UDIMMs, giving 32GB total; no additional modules are required.

Should I choose this CL19 2666MHz kit or a faster CL18 alternative for my Precision 3930 Rack?

The Precision 3930 Rack is validated for DDR4 2666 CL19 1.20V 1Rx8 UDIMMs; a faster CL18 module would run at the same 2666MHz speed.

Will the advertised PC4-21300 bandwidth actually appear in Windows Task Manager after installation?

Task Manager reports the JEDEC data rate of 2666MT/s; the PC4-21300 figure is the theoretical peak transfer rate calculated from that speed.

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