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Green rectangular circuit board with black memory chips and gold edge connectors

Crucial

Crucial CT8G4DFS8266 8GB DDR4 2666 desktop RAM

SKU CH-8W92-XB41K MPN CT8G4DFS8266

8GB DDR4 2666 desktop memory module with CL19 latency and 1.20V operation

  • Capacity8GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Boosts bandwidth by up to 32% over DDR3
  • Cuts power draw by up to 40% versus DDR3
  • Runs at 2666 MT/s with CL19 latency
  • Operates at 1.20V for cooler operation
  • Unbuffered non-ECC design suits standard desktop boards

8GB DDR4 2666 Desktop Module

This Crucial CT8G4DFS8266 module provides 8GB of DDR4 memory rated at 2666 MT/s with a CAS latency of 19. It operates at the standard 1.20V and uses an unbuffered, non-ECC design. The DIMM is built for desktop systems that support DDR4 technology.

Suits mainstream desktop upgrades.

The stick fits standard consumer motherboards that accept unbuffered DDR4 DIMMs. It will not work in servers or workstations that require registered or ECC memory. Builders needing capacities beyond 8GB per slot or speeds higher than 2666 MT/s should consider other modules.

Speed rating DDR4 2666 (PC4 21300)

The 2666 MT/s data rate sets the peak bandwidth this module can deliver. Systems limited to lower DDR4 speeds will run the memory at the slower rate, while platforms that support 2666 MT/s gain the full throughput advantage over DDR3.

Highlights

  • Boosts bandwidth by up to 32% over DDR3
  • Cuts power draw by up to 40% versus DDR3
  • Runs at 2666 MT/s with CL19 latency
  • Operates at 1.20V for cooler operation
  • Unbuffered non-ECC design suits standard desktop boards

Specifications

BrandCrucial
ModelCT8G4DFS8266
Capacity8GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
FeaturesSpeeds start at 2133 MT/s and faster data rates are expected to be available as DDR4 technology matures
Increase bandwidth by up to 32%
Reduce power consumption by up to 40%
Faster burst access speeds for improved sequential data throughput
Optimized for next generation processors and platforms
Available in four channel kits up to 64GB

Questions about this item

How much heat and power does the 1.20V DDR4 2666 module draw when running all day?

The module operates at 1.20V, reducing power consumption by up to 40% versus DDR3, so it generates less heat during continuous use.

What motherboard slot and memory controller does the CT8G4DFS8266 require to work?

It needs a DDR4 DIMM slot and a memory controller that supports DDR4 2666 (PC4 21300) unbuffered non-ECC memory.

Will this DDR4 2666 stick run alongside the DDR3 memory I already have installed?

No, DDR4 and DDR3 use different physical slots and voltages, so they cannot be mixed in the same system.

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