Crucial 16GB DDR4 2666 MHz UDIMM Desktop Memory Module

The Crucial CT16G4DFD8266 is a 16 GB DDR4 memory module for desktop PCs that use 288-pin UDIMM slots. Operating at 2666 MHz, also known as PC4-21300, it supplies the extra bandwidth a modern processor needs to keep everyday tasks and demanding applications responsive.

If you are moving from DDR3 memory, you will notice roughly 30 percent faster data rates and better multitasking headroom. Web browsers with many tabs, office suites, and light photo or video editors open quicker and run more smoothly, while games benefit from more consistent frame delivery.

The module draws only 1.2 V, so it consumes less power than older memory generations. Lower power use means less heat, quieter fan speeds, and a modest reduction in overall energy costs, an advantage for systems that stay on for long stretches.

A dual-rank layout with CL19 latency delivers a solid balance of capacity and timing. Because it is unbuffered and non-ECC, installation is as simple as inserting the module into a compatible slot—no special settings are required. Builders upgrading an office workstation, students refreshing a study rig, and content creators who need extra RAM for multitasking will all find this module a straightforward path to better performance.

Crucial tests its memory for broad motherboard compatibility, so you can upgrade with confidence and get back to work or play in minutes.

Highlights:

• 16 GB capacity
• DDR4 speed 2666 MHz (PC4-21300)
• 288-pin UDIMM form factor
• Dual-rank design that is unbuffered and non-ECC
• 1.2 V operating voltage supports efficient power use
• CL19 latency for dependable performance