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Green circuit board with black memory chips, no heat spreader

Crucial

Crucial CT16G4DFRA266 16GB DDR4 2666 desktop RAM

SKU CH-8BA2-01A6B MPN CT16G4DFRA266

16GB DDR4 desktop module at 2666 MT/s with CL19 timing and 1.20V operation

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered

Capacity 16GB

Speed DDR4 2666 (PC4 21300)

CAS Latency CL19

  • 16 GB capacity supports demanding multitasking
  • 2666 MT/s DDR4 speed enables fast data throughput
  • CL19 19-19-19 timing delivers responsive memory access
  • 20 V operation reduces power consumption by up to 40 %
  • Unbuffered 288-pin design fits standard desktop motherboards

16GB DDR4 2666 desktop module

This 16GB unbuffered DDR4 module runs at 2666 MT/s with CL19 timings and a 1.20V operating voltage. It fits standard 288-pin desktop slots and is suited to system builders upgrading a single channel or adding capacity to an existing DDR4 platform.

No heat spreader or software bundle

The module ships without a heat spreader, keeping the profile low for tight clearance around large CPU coolers. There is no bundled software or lighting controller; the only changes are the 32% bandwidth increase and 40% power reduction quoted for DDR4 technology over the previous generation.

Simple slot-in install, check BIOS first

Installation is a standard DIMM insertion: align the notch, press until the latches click, then power on. Most issues arise when the motherboard BIOS defaults to a lower speed or when mixing modules with different timings, so verify the memory runs at 2666 MT/s in firmware after boot.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $57.99
Cheaper than about 61% of the 3,647 comparable items (median $90.99).
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $3.62 per GB
Cheaper than about 87% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameCrucial
Model nameCT16G4DFRA266
Total capacity16 GB
Product type288-Pin PC RAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Size & build
Shipping weight0.03 kg
Package size517 × 254 × 6 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the module without a heat spreader need extra cooling or replacement over time?

The module runs at 1.20V without a heat spreader; standard case airflow is sufficient and no scheduled replacement is required.

What limits sustained throughput first on this CL19 2666 MT/s kit?

The 19-19-19 timing at 2666 MT/s sets the latency ceiling before bandwidth saturates under continuous load.

How much power and heat does the 1.20V 16GB stick produce during all-day operation?

At 1.20V the stick draws minimal power and runs cool; the vendor notes up to 40% lower consumption versus older DDR4 designs.

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