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Green rectangular DDR4 UDIMM module with gold contacts and black chips

Micron Technology, Inc.

Micron Technology, Inc. CT16G4DFS8266 16GB DDR4-2666 CL19 1.2V 288-PIN Desktop RAM

SKU CH-Y4RF-2624K

16 GB DDR4 desktop memory module running at 2666 MT/s with CL19 latency and 1.2 V operation

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Product colorGreen
  • 16 GB capacity handles larger workloads and multitasking
  • DDR4-2666 speed delivers 2666 MT/s data rates
  • CL19 latency with 19-19-19 timings for responsive access
  • 2 V operation reduces power draw and heat
  • 288-pin UDIMM fits standard desktop DIMM slots

16GB DDR4-2666 Desktop Module

This 16GB DDR4-2666 UDIMM operates at 2666MT/s with CL19 timings and a 1.2V profile. It is built for desktop systems that require standard unbuffered non-ECC memory. The single-ranked x8 design fits 288-pin slots on compatible motherboards. It suits general computing and office workloads.

Not for ECC or Laptop Builds

This module lacks error-correcting code support, so it does not meet the needs of workstations or servers that require data integrity protection. The 288-pin form factor prevents installation in laptops or small-form-factor systems that use SO-DIMM slots. Buyers needing registered or load-reduced memory should select a different module type.

Single 16GB Density Decides Fit

The 16GB capacity on a single rank determines whether this module completes a desired memory configuration. Systems with limited slots benefit from the higher density per stick. Builders targeting a specific total capacity must calculate how many modules their board accepts. The CL19 latency and 1.2V operation are fixed characteristics of this density.

How it compares

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

Price $79.99
Typical for this category: the median of 3,647 items is $90.99.
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $5.00 per GB
Cheaper than about 72% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Total capacity16 GB
Product colorGreen
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
More details
LED lightingNone

Questions about this item

Will this 288‑pin DDR4 UDIMM fit a standard desktop motherboard slot?

Yes, the module uses the 288‑pin UDIMM form factor for DDR4 desktop boards.

What is the correct way to seat the module, and which step is often missed?

Align the notch with the slot key, press firmly until both side clips click, then verify the clips are fully locked.

When should this 16GB DDR4‑2666 stick be replaced?

Replace it if memory diagnostics report errors, the system becomes unstable, or you need more capacity or speed.

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