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Crucial 16GB 260-Pin DDR4 2666 (PC4-21300) SDRAM SODIMM Memory Module, CL19, Unbuffered, Dual Ranked x8, 2048M x 64, Non-ECC, 1.2V (CT16G4SFD8266)
- Unbuffered
- Non-ECC
- Dual rank, x8 based
- Compatible with OEM systems
- 100% factory tested for superior reliability
- Free technical support
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More speed. More battery life. More memory capacity. Fuel your next-gen laptop. In the ever-changing world of technology, any component more than five years old is usually in need of an update. At seven years old and counting, that's where
DDR3 memory is at: laptops can only do so much with it. Since the introduction of DDR3 memory technology in 2007, processors have doubled in capability, SSDs have revolutionized throughput, and graphics cards have drastically increased frame rates, leaving memory as a limiting factor. With Crucial DDR4 SODIM
Ms, crush the DDR3 memory bottleneck and unlock a new standard of performance. More Energy EfficientExtend battery life by using less power. Operating at just 1.2V compared to 1.5V for standard DDR3 memory, Crucial DDR4 SODIM
Ms consume 20% less voltage than standard DDR3 technology. Crucial DDR4 SODIM
Ms also cont...
Memory Size: 16
GBMemory Technology: DDR4 SDRAM
Memory Voltage: 1.20
VMemory Speed: 2666
MHzMemory Standard: DDR4-2666/PC4-21300Error
Checking: Non-ECC
Signal Processing: UnbufferedCAS
Latency: CL19Device
Supported: NotebookNumber of
Pins: 260-pinForm
Factor: SoDIMM
Weight (Approximate): 0.56 oz
DDR3 memory is at: laptops can only do so much with it. Since the introduction of DDR3 memory technology in 2007, processors have doubled in capability, SSDs have revolutionized throughput, and graphics cards have drastically increased frame rates, leaving memory as a limiting factor. With Crucial DDR4 SODIM
Ms, crush the DDR3 memory bottleneck and unlock a new standard of performance. More Energy EfficientExtend battery life by using less power. Operating at just 1.2V compared to 1.5V for standard DDR3 memory, Crucial DDR4 SODIM
Ms consume 20% less voltage than standard DDR3 technology. Crucial DDR4 SODIM
Ms also cont...
Memory Size: 16
GBMemory Technology: DDR4 SDRAM
Memory Voltage: 1.20
VMemory Speed: 2666
MHzMemory Standard: DDR4-2666/PC4-21300Error
Checking: Non-ECC
Signal Processing: UnbufferedCAS
Latency: CL19Device
Supported: NotebookNumber of
Pins: 260-pinForm
Factor: SoDIMM
Weight (Approximate): 0.56 oz
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- Return for refund within: 30 days
- Return for replacement within: 30 days
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The Crucial CT16G4SFD8266 is a 16GB DDR4-2666 260-pin SO-DIMM laptop memory module for compatible systems needing a single non-ECC, unbuffered memory upgrade. It runs at 1.2V and has CL19 timing.
Recommended For
- Owners of a compatible, upgradeable DDR4 laptop whose 8GB setup runs short during office work, research, and keeping many browser tabs and apps open; this module adds 16GB of memory capacity.
- Laptop owners with an available 260-pin DDR4 SODIMM slot who want to add memory without replacing their existing module, provided the laptop supports this module’s capacity and speed.
- Owners of an older DDR4 laptop who want a standard 16GB module for a capacity upgrade or replacement, rather than changing the laptop’s processor or graphics hardware.
- Owners of a compatible DDR4 gaming laptop targeting a 16GB memory configuration for gaming and everyday multitasking; the module increases memory capacity but does not upgrade graphics or processor performance.
Real-World Use Scenarios
- On a compatible laptop that is running short on memory, upgrading to 16GB can help keep browser tabs, office apps, and email open together with fewer slowdowns when switching between them. The benefit depends on the laptop’s current memory and configuration.
- For school or remote work, a user can keep a video call, notes or documents, and research tabs open at once; moving from a memory-limited setup may reduce pauses caused by the laptop juggling open apps.
- When working with a large spreadsheet or editing photos while other apps remain open, 16GB can provide more room for those tasks to coexist, especially if the laptop’s existing memory is nearly full; it does not guarantee faster processing on its own.
- For someone upgrading an older laptop with limited RAM, this module may be a straightforward capacity upgrade if the laptop supports this memory type and module size; checking the exact model’s compatibility first helps avoid an unsuccessful installation.









