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Two green DDR4 DIMMs with black heat spreaders and gold contacts

Crucial

Crucial CT2K8G4DFRA266 16GB (2 x 8GB) DDR4 2666 desktop RAM

SKU CH-YM0M-JEW4T MPN CT2K8G4DFRA266

A 16 GB dual-channel DDR4 kit running at 2666 MT/s with CL19 latency and 1.2 V operation

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type288-Pin PC RAM

Capacity 16GB (2 x 8GB)

Speed DDR4 2666 (PC4 21300)

CAS Latency CL19

  • Faster data transfer at 2666 MT/s for responsive multitasking
  • Up to 32% more bandwidth boosts throughput for demanding tasks
  • Up to 40% less power used at 1.2V voltage
  • Faster burst access improves sequential data throughput
  • Dual 8GB unbuffered DIMMs give 16GB total capacity

Dual-channel DDR4 kit

This 16 GB kit contains two 8 GB unbuffered DIMMs built for desktop systems that use 288-pin DDR4 slots. It targets builders who want a matched pair for dual-channel operation at standard voltage.

Standard 288-pin form factor

Each module runs at 1.2 V and carries a CL19 timing at 2666 MT/s. The familiar 288-pin layout fits any desktop board wired for DDR4 without needing low-profile clearance or special mounting hardware.

Matched pair for dual-channel bandwidth

The two sticks are factory paired so the memory controller can open both channels simultaneously, raising throughput by up to 32 % while cutting draw by up to 40 % versus a single module at the same speed.

How it compares

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

Price $47.99
Cheaper than about 67% of the 3,647 comparable items (median $90.99).
Total capacity 16 GB (2 × 8 GB)
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $3.00 per GB
Cheaper than about 91% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameCrucial
Model nameCT2K8G4DFRA266
Total capacity16 GB (2 × 8 GB)
Product type288-Pin PC RAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Buffer typeUnbuffered
Power
Rated voltage1.2 V
Size & build
Shipping weight0.05 kg
Package size174 × 83 × 9 mm

Other versions of this model

5 more in the same range

Questions about this item

What DDR4 speed does the CT2K8G4DFRA266 kit run at and what bandwidth ceiling does that impose?

The kit operates at 2666 MT/s, rated PC4 21300, which caps theoretical peak bandwidth at that data rate.

What physical slot and pin count must the motherboard provide for these modules?

Each 8 GB module is a 288-pin unbuffered DIMM, so the board needs standard desktop DDR4 slots.

How are the two sticks installed for dual-channel operation and what step is often missed?

Populate the two slots that share a channel — usually the same colour — and press each module down until the retention clips click on both ends.

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