Technical Snapshot

The Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 is a high-performance DDR4 desktop memory module . Running at 2,666 MT/s with CL19-19-19-42 timings at 1.2V, The module provides 16GB of DDR4 memory . Backed by a Limited Lifetime warranty, suited for gaming PCs, productivity workstations, and general desktop computing.

Use Case
Gaming, content creation, desktop computing
Compatibility
DDR4-compatible desktop motherboard
Category
DDR4 DIMM — Crucial Crucial
CRUCIAL Image not available
Crucial RAM
Crucial Crucial

DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266

DDR4 · DIMM · 2,666 MT/s · CL19-19-19-42 · 16GB

Memory transfer rate in megatransfers per second. Higher MT/s provides more bandwidth for CPU-bound workloads.
Speed 2,666 MT/s
Total kit capacity across all modules. Dual-channel kits double memory bandwidth.
Capacity 16GB
CAS latency and full timing chain. Lower CL means faster first-byte access time.
Timings CL19-19-19-42
Operating voltage. Higher voltage allows faster speeds but increases power and heat.
Voltage 1.2V
MPNCT16G4DFS8266
EAN0649528790163
CategoryMemory
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Memory Specifications

Memory TypeDDR4
Form FactorDIMM
Total Capacity16GB
Speed2,666 MT/s
TimingsCL19-19-19-42
Voltage1.2V
Module Height33.5 mm
WarrantyLimited Lifetime

Full Specifications

Data sourced from Crucial product specifications
Memory
Product LineCrucial
Memory TypeDDR4
Form FactorDIMM
Total Capacity16GB
Module Count1
Module Capacity16GB
Speed2,666 MT/s
Timings & Voltage
TimingsCL19-19-19-42
Voltage1.2V
Design
Module Height33.5 mm
Product
BrandCrucial
MPNCT16G4DFS8266
EAN0649528790163
WarrantyLimited Lifetime
Physical
Weight0.050 kg (estimated)
Package Dimensions14.0 x 8.0 x 1.0 cm (estimated)

Support

Crucial Memory Compatibility ToolCheck motherboard compatibility for this module
Crucial Support →
Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 DatasheetPDF · Technical specifications
Crucial Support →
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Frequently Asked Questions

What motherboards are compatible with this memory?

The Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 requires a DDR4-compatible motherboard. Compatible platforms include AMD AM4 (B550, X570, B450, etc.) and Intel LGA 1700 (B660, Z690) or LGA 1200 (B560, Z590). DDR4 is NOT compatible with DDR5 slots — they use different pin configurations.

What speed does this memory run at?

The Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 runs at 2,666 MT/s with CL19-19-19-42 timings. This is a JEDEC standard speed that works automatically without BIOS configuration.

Can I add more memory later?

Yes, the Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 is a single 16GB module. You can add additional compatible DDR4 DIMM modules to populate empty slots. For best performance, use matched modules of the same speed and capacity to enable dual-channel mode.

What is the form factor of this memory?

The Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 uses a DIMM form factor. Standard DIMM modules fit desktop motherboards.

What warranty does this memory come with?

The Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266 comes with a Limited Lifetime warranty from Crucial.

JSON-LD Structured Data — Product + FAQ + Breadcrumb
Product: Crucial DDR4 16GB 2666MT/s DIMM CL19 — CT16G4DFS8266
MPN: CT16G4DFS8266
Schemas: Product + BreadcrumbList + FAQPage
Properties: 11 additionalProperty entries
Related: 4 isRelatedTo links