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Two green 288-pin DDR4 DIMMs with black chips

Crucial

Crucial CT2K16G4DFD8266 32GB (2x16GB) DDR4-2666 CL19 Desktop RAM

SKU CH-ERMN-3FCRJ MPN CT2K16G4DFD8266

A 32GB dual-channel DDR4-2666 kit with CL19 latency and 1.20V operation for desktop upgrades

  • Capacity32GB (2 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered

Capacity 32GB (2 x 16GB)

  • 32 GB total capacity from two 16 GB modules
  • DDR4-2666 speed delivers 2666 MT/s data rate
  • CL19 latency at 1.20 V operating voltage
  • Unbuffered non-ECC design fits standard desktop DIMM slots
  • 100 % factory tested for reliability out of the box

32GB Dual-Channel DDR4 Kit

This 32GB kit contains two 16GB DDR4-2666 DIMMs with CL19 latency. It is built for desktop systems that use 288-pin unbuffered, non-ECC memory. The modules run at 1.20V and are 100% factory tested for reliability.

Unbuffered 288-Pin DIMM Fit

Each module is a standard unbuffered DIMM that fits mainstream desktop motherboards with DDR4 slots. The dual-rank x8 design works without registered or ECC support, freeing the builder from needing server-class chipsets or buffered memory controllers.

2666 MT/s Speed and 32GB Capacity

At 2666 MT/s the kit delivers PC4-21300 bandwidth for everyday multitasking and office workloads. The 32GB total capacity handles large browser sessions and light content creation, while the CL19 latency and fixed voltage limit headroom for heavy overclocking or extreme bandwidth tasks.

Highlights

  • 32 GB total capacity from two 16 GB modules
  • DDR4-2666 speed delivers 2666 MT/s data rate
  • CL19 latency at 1.20 V operating voltage
  • Unbuffered non-ECC design fits standard desktop DIMM slots
  • 100 % factory tested for reliability out of the box

Specifications

BrandCrucial
ModelCT2K16G4DFD8266
Capacity32GB (2 x 16GB)
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
FeaturesCT2K16G4DFD8266 is a 32GB Kit consisting of (2) 16GB DDR4 desktop modules that operates at speeds up to 2666 MT/s and has a CL19 latency. It is an Unbuffered DIMM. It conforms to the industry standard DDR4 ECC UDIMM layout of 288 pins and is compatible with systems that take DDR4 2666 MT/s UDIMM memory.
Shipping weight0.08 kg
Package size178 × 127 × 11 mm

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Questions about this item

Will the CL19 latency at 2666 MT/s become the bottleneck during sustained workloads?

The modules run at 2666 MT/s with CL19 timing and 1.20 V; latency is fixed by the JEDEC profile and does not change under load.

How much heat or noise should I expect when the kit runs all day at 1.20 V?

Unbuffered DDR4 DIMMs have no moving parts and operate at 1.20 V, so they produce minimal heat and zero audible noise during continuous use.

What motherboard slot and CPU memory controller do I need for this 288-pin DDR4 kit to work?

You need a desktop board with DDR4 288-pin DIMM slots and a CPU memory controller that supports DDR4-2666 operation.

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