Crucial 16GB Kit (8GB x 2) DDR4 2666 MT/s (PC4-21300) SODIMM 260-Pin Memory - CT2K8G4SFRA266
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
This 16GB (2x8GB) DDR4 2666 MT/s CL19 SODIMM kit is for laptop owners needing a standard memory upgrade for improved multitasking and system responsiveness.
This 16GB 2666 MT/s DDR4 SODIMM kit is a straightforward upgrade for many laptops, offering increased capacity and standard speed. Its 1.2V operation and 260-pin form factor align with typical laptop memory requirements. However, potential compatibility quirks with specific systems and reports of initial defects mean it's not a guaranteed plug-and-play for every scenario.
If this kit isn't enough, look for DDR4 SODIMM with a higher frequency (e.g., 3200 MT/s) and lower CAS Latency (e.g., CL16) if your laptop's motherboard supports it.
Regret Score™
Very High RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Provides 16GB capacity across two 8GB modules, suitable for dual-channel configurations.
- Operates at 2666 MT/s, a common speed for many DDR4 laptops, and at 1.2 Volts for energy efficiency.
- Increases memory bandwidth by up to 30% compared to slower modules.
- Reduces power consumption by up to 40%, potentially extending laptop battery life.
- Backed by Micron's manufacturing quality and a limited lifetime warranty.
Cons
- Some users reported receiving defective modules or experiencing failures within a week.
- Compatibility can be an issue with specific systems, such as certain Synology NAS models that require dual-rank memory.
- The CL19 latency is standard but not optimized for performance-critical applications.
- No XMP profiles for easy performance tuning beyond JEDEC specifications.
Dimension Scores
The 2666 MT/s speed and CL19 latency are standard JEDEC specifications for DDR4 SODIMM, not offering performance beyond the average.
While broadly compatible with many laptops, some specific systems like certain Synology NAS devices have reported compatibility issues, preventing a higher score.
This JEDEC-spec SODIMM kit is not designed for overclocking and lacks XMP profiles, offering no headroom for performance tuning.
Crucial, as a Micron brand, generally has a reputation for manufacturing reliable memory, though some users reported defective modules or early failures.
Best For
- Upgrading a laptop with 8GB or less DDR4 2666 MT/s memory for general use.
- Users needing to run multiple applications simultaneously without system slowdowns.
- Replacing a single 8GB module to enable dual-channel memory operation in compatible laptops.
Not Recommended For
- Laptops or systems requiring higher memory speeds (e.g., 3200 MT/s or faster) for demanding tasks.
- Users seeking memory with low latency (e.g., CL16 or lower) for competitive gaming or specific workloads.
- Systems with strict memory compatibility requirements, such as some Synology NAS devices that may need specific rank configurations.
Watch Out For
- Some buyers reported the RAM being dead on arrival or failing within a week of installation.
- Compatibility issues have been noted with certain Synology NAS models, where the memory might not be recognized or function correctly.
- A user encountered difficulty with the memory module's clamp closing during installation, suggesting potential fitment variations in some laptop slots.
Full Specifications
| RAM | 16 GB DDR4 |
| ASIN | B08C4RPRCH |
| Brand | Crucial |
| Series | Crucial Memory |
| Voltage | 1.2 Volts |
| Language | English, English, English, English, English |
| Item Weight | 0.3 ounces |
| Manufacturer | Crucial |
| Memory Speed | 2666 MHz |
| Flash Memory Size | 128 GB |
| Item model number | CT2K8G4SFRA266 |
| Compatible Devices | Laptop |
| Product Dimensions | 2.7 x 0.43 x 1.1 inches |
| Computer Memory Size | 16 GB |
| Computer Memory Type | DDR4 SDRAM |
| Number of Processors | 1 |
| RAM Memory Technology | DDR4 |
| Item Dimensions LxWxH | 2.7 x 0.43 x 1.1 inches |
What Buyers Say
Many users find this Crucial 16GB kit to be a straightforward and effective upgrade for their laptops, often reporting immediate improvements in system responsiveness and multitasking. However, a small but consistent number of buyers have experienced issues with modules being dead on arrival or failing shortly after installation. Compatibility can also be a point of concern, particularly with specific non-laptop devices like some Synology NAS units, where the memory might not be recognized despite matching specifications. Installation is generally reported as easy, but a few users have noted minor physical fitment challenges.
“Man, I just needed my old laptop to stop chugging with 8GB, and this did the trick. Plugged it in, booted up, and now I can actually have more than two tabs open without it freezing. Totally worth it, even if I was a little worried about it not working after reading some reviews.”
Common Praise
- System feels faster and more responsive after installation.
- Easy to install in compatible laptops.
- Enables smoother multitasking with multiple applications open.
- Recognized immediately by most systems upon boot-up.
Common Complaints
- Some modules were defective out of the box or failed within a week.
- Incompatible with certain Synology NAS models, even when specs appear to match.
- One user reported the clamp not closing properly during installation.
Ownership Tips
- The performance boost is most noticeable when upgrading from 8GB or less, especially for users who frequently have many browser tabs or applications open.
- Some systems might require a BIOS update to fully recognize and utilize the new memory, especially older laptops.
- Even if your system supports 2666 MT/s, it might downclock the RAM to a lower speed if other installed modules or the CPU/chipset have limitations.
- The low 1.2V operation helps keep laptop temperatures down compared to some higher-voltage modules.
Frequently Asked Questions
Is this RAM compatible with my laptop?
This is 260-pin DDR4 SODIMM memory operating at 2666 MT/s and 1.2V. You need to check your laptop's specifications to ensure it supports DDR4 SODIMM at this speed and voltage. Crucial also offers a system scanner tool on their website to verify compatibility.
Will this memory improve my laptop's performance?
If your laptop currently has less than 16GB of RAM or is running in single-channel mode, upgrading to this 16GB kit can significantly improve multitasking capabilities and overall system responsiveness by increasing bandwidth by up to 30%.
What does CL19 latency mean?
CL19 refers to the CAS Latency, which is 19 clock cycles. This is a standard latency for 2666 MT/s DDR4 memory. While lower CL numbers are faster, CL19 is typical for general-purpose laptop memory.
Is this memory suitable for gaming laptops?
For casual gaming or older titles, 16GB at 2666 MT/s is often sufficient. However, modern gaming laptops and demanding games often benefit from faster memory (e.g., 3200 MT/s or higher) with lower latencies for optimal frame rates.
Does this RAM come with a warranty?
Yes, Crucial memory products are backed by a limited lifetime warranty, reflecting the manufacturer's confidence in their quality.
Buying Guide
When you're looking at laptop memory, you're mostly trying to figure out how much RAM you need and if it'll actually fit and work in your machine. More RAM lets you do more things at once without your computer slowing down. The speed matters too, but compatibility is king. Always check your laptop's manual or use an online scanner to be sure.
Capacity (16GB)
This is how much data your computer can actively work with at one time. Think of it like your desk space: 16GB means you have a bigger desk to spread out more papers (programs and files) without having to constantly put things away and pull them back out, making everything feel faster.
Speed (2666 MT/s)
This is how quickly the memory can transfer data. It's like how fast you can grab those papers from your desk. Higher numbers mean faster data transfer, which can make a difference in how quickly applications load and respond, though your computer's processor and motherboard also need to support that speed.
Type (DDR4 SODIMM)
DDR4 is the generation of memory, and SODIMM refers to the physical size, which is smaller for laptops compared to desktop RAM (DIMM). You absolutely need to match both the DDR generation (DDR4) and the form factor (SODIMM) to your laptop, otherwise it simply won't fit or work.
Voltage (1.2 Volts)
This is the power required to run the memory. Most DDR4 runs at 1.2V, which is more power-efficient than older DDR3. Matching the voltage is important for stability and to prevent damage, though most modern systems are somewhat flexible.
Alternatives
If this kit doesn't fit your needs, search for DDR4 SODIMM with a higher MT/s speed (e.g., 3200 MT/s or 3600 MT/s) and a lower CL latency (e.g., CL16) if your system supports it, or a single 16GB module if you only have one available slot.
You Might Also Like
Crucial 32GB DDR4 RAM Kit (2x16GB), 3200MHz (PC4-25600) CL22 Laptop Memory, SODIMM 260-Pin, Downclockable to 2933/2666MHz, Compatible with 13th Gen Intel Core and AMD Ryzen 7000 - CT2K16G4SFRA32A
A 32GB (2x16GB) DDR4 3200MHz CL22 SODIMM kit operating at 1.2V, designed for laptops needing a significant boost in multitasking and system responsiveness.
Crucial 16GB DDR4 RAM, 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory, SODIMM 260-Pin, Compatible with 13th Gen Intel Core and AMD Ryzen 7000 - CT16G4SFRA32A
This 16GB DDR4 SODIMM 260-pin module at 3200MHz CL22 is for laptop owners needing a straightforward performance boost for multitasking and application loading.
Corsair Vengeance LPX DDR4 RAM 16GB (2x8GB) 3200MHz CL16-18-18-36 1.35V Intel AMD Desktop Computer Memory - Black (CMK16GX4M2B3200C16)
This 16GB (2x8GB) DDR4 3200MHz CL16 RAM kit offers 1.35V operation and a 34mm low-profile design for most Intel and AMD desktop builds.
Crucial 8GB DDR4 RAM 3200MHz (PC4-25600), Downclockable to 2933/2666MHz Laptop Memory, SODIMM 260-Pin CL22, Compatible with 13th Gen Intel Core and AMD Ryzen 7000 - CT8G4SFRA32A
This 8GB DDR4 3200MHz CL22 SODIMM is a budget-friendly upgrade for laptops needing a performance bump for everyday tasks and light multitasking.