Crucial 16GB, 260-pin SODIMM, DDR4 PC4-21300,
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AI Verdict
A 16GB, 260-pin, DDR4-2666MHz CL19 dual-rank SODIMM for upgrading laptops and compatible NAS devices.
This 16GB DDR4-2666MHz CL19 dual-rank SODIMM is a direct fit for many laptops and NAS devices requiring this specific memory type, offering a noticeable performance bump for systems currently running less RAM. Its dual-rank configuration addresses known compatibility issues with certain NAS models.
If your system supports it, look for DDR4-3200MHz with a lower CAS latency (e.g., CL16 or CL18) for a more significant performance improvement, especially in CPU-intensive tasks or gaming.
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Pros
- Provides 16GB of DDR4 memory at 2666 MHz, boosting system capacity and speed for multitasking.
- Features a CL19 CAS latency, which is typical for laptop memory at this speed.
- Designed as a dual-rank (DR x8) module, which can improve compatibility and performance in some systems, particularly Synology NAS devices.
- Operates at 1.2 Volts, adhering to the standard low-power requirements for DDR4 SODIMM.
- Many users report successful installation and improved performance in various laptops and NAS models.
Cons
- The 2666MHz speed might not be optimal for newer gaming laptops or systems that support faster DDR4 RAM (3000MHz or 3200MHz).
- Some users reported receiving a different 'Basics' model (CB16GS2666) instead of the ordered CT16G4SFD8266, leading to potential confusion or returns.
- While dual-rank is generally a pro, some specific systems might have compatibility quirks if not explicitly designed for it, as seen with some Synology NAS users experiencing issues with single-rank modules.
- Overclocking headroom is practically nonexistent, as is typical for SODIMM modules.
Dimension Scores
The 2666MHz speed and CL19 latency are standard for DDR4 SODIMM, offering competent performance for most laptop and NAS applications.
Its 260-pin SODIMM form factor, 1.2V operation, and dual-rank configuration make it broadly compatible with many laptops and specific NAS devices that require these specifications.
As a standard SODIMM module, it offers no advertised or expected overclocking capabilities, which is typical for this product category.
Crucial is a reputable memory brand, and user feedback indicates consistent functionality and a high Amazon rating of 4.8/5 across many reviews.
Best For
- Upgrading an older laptop with 2666MHz DDR4 support to 16GB.
- Expanding memory in compatible Synology NAS devices that require dual-rank SODIMM.
- Users needing a straightforward memory upgrade without complex timing adjustments.
Not Recommended For
- High-performance gaming rigs or workstations that can utilize DDR4-3200MHz or faster RAM.
- Systems where only single-rank memory is explicitly supported or preferred for specific compatibility reasons.
- Users looking for memory with overclocking capabilities.
Watch Out For
- Receiving a 'Basics' model (CB16GS2666) instead of the specified CT16G4SFD8266 has been reported by some buyers.
- Compatibility issues can arise in Synology NAS devices if the installed RAM is single-rank, even with matching specs, making the dual-rank nature of this module important.
- Mixing this CL19 module with existing RAM of a different CAS latency might cause the system to default to the slower timing or lead to instability.
Full Specifications
| RAM | 16 GB DRAM |
| ASIN | B071KP8CGJ |
| Brand | Crucial |
| Color | Multicolor |
| Series | CT16G4SFD8266 |
| Voltage | 1.2 Volts |
| Item Weight | 0.32 ounces |
| Manufacturer | Crucial Technology |
| Memory Speed | 2666 MHz |
| Flash Memory Size | 1 |
| Hardware Platform | PC |
| Item model number | CT16G4SFD8266 |
| 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 | DRAM |
| Item Dimensions LxWxH | 2.7 x 0.43 x 1.1 inches |
| Is Discontinued By Manufacturer | No |
What Buyers Say
The biggest takeaway from user feedback is that this 16GB Crucial SODIMM is a go-to for many looking to upgrade their laptops or even Synology NAS devices, especially because it's dual-rank. People often praise how easy it is to install and the immediate performance boost they get. However, a few folks have been annoyed by receiving a slightly different 'Basics' model, which can be a hassle. The 2666MHz speed is generally accepted as perfectly fine, but some power users wish for faster options if their system supported it. Compatibility with Synology NAS seems to hinge on this being a dual-rank module, which this one is.
“Dude, I just popped this into my old laptop and it's like a whole new machine, no more lag when I have a million tabs open, totally worth it.”
Common Praise
- Easy installation process, often taking only a few minutes.
- Immediate and noticeable performance improvement in laptops after upgrading.
- Successfully recognized and utilized by various Synology NAS models.
- The dual-rank configuration resolves compatibility issues some users faced with single-rank modules in specific devices.
Common Complaints
- Some customers received a 'Crucial Basics' module (CB16GS2666) instead of the specified CT16G4SFD8266.
- Not the fastest speed available for DDR4, with some users desiring 3000MHz or 3200MHz for more demanding tasks.
- A few reports of initial boot issues or flashing lights in Synology NAS devices, though often resolved by reseating or confirming dual-rank requirement.
Ownership Tips
- The 'dual-rank' aspect is crucial for certain NAS devices; single-rank modules with identical specs might not work.
- Even if your system supports faster RAM, this 2666MHz module will likely default to the highest supported speed, which might still be 2666MHz for many older laptops.
- Check the exact model number on the stick you receive; some users got a 'Basics' version that caused confusion.
- Installation is genuinely simple, often just requiring a screwdriver and a few minutes.
Frequently Asked Questions
What is the CAS Latency of this RAM module?
This Crucial 16GB SODIMM has a CAS Latency of CL19.
Is this memory module dual rank or single rank?
This is a dual-rank (DR x8) memory module, which is important for compatibility with some systems like Synology NAS devices.
Can I use this RAM in a Synology NAS?
Many users have successfully used this specific module (CT16G4SFD8266) in compatible Synology NAS models like the DS1522+ and 920+, especially due to its dual-rank nature.
Will this 2666MHz RAM be fast enough for gaming?
While 2666MHz DDR4 RAM is functional for gaming, systems that support faster speeds like 3000MHz or 3200MHz will generally see better performance, particularly if your motherboard supports those speeds.
What voltage does this memory operate at?
This DDR4 SODIMM operates at 1.2 Volts, which is standard for DDR4 memory.
Buying Guide
When you're looking at laptop memory like this, you need to match a few key things to your computer. First, check if your laptop uses SODIMM (the smaller sticks) and DDR4. Then, confirm the speed (like 2666MHz here) and voltage (1.2V for DDR4). If you're adding to existing RAM, try to match the CAS Latency (CL19 for this one) and ideally the rank (dual-rank is what this is) to avoid any headaches. Don't just buy the fastest RAM you can find; your laptop's motherboard has a speed limit.
Capacity (16GB)
This is how much data your computer can actively work with at once. Think of it like your desk space; more GB means you can have more applications open and switch between them without things slowing down. 16GB is a solid amount for everyday use and light multitasking.
Speed (2666MHz)
This is how fast the memory can transfer data to your processor. Imagine it as the speed limit on a highway. A higher MHz means data can move faster, but your computer's motherboard has its own speed limit, so going too fast won't help if your system can't handle it.
CAS Latency (CL19)
This is the delay, measured in clock cycles, between when your processor asks for data and when the memory actually starts sending it. Lower numbers are better, like a shorter wait time at a traffic light. For 2666MHz DDR4, CL19 is a common and acceptable latency.
Dual Rank (DR x8)
This refers to how the memory chips are organized on the stick. Think of it like having two separate lanes on a road for data. Some systems, especially certain NAS devices, perform better or even require dual-rank modules for full compatibility and stability.
Alternatives
If this isn't enough, look for DDR4 SODIMM with 32GB capacity, or if your system supports it, modules with 3000MHz or 3200MHz speed and a lower CAS latency like CL16 or CL18.
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