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Crucial 4GB Single DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT51264BF186DJ

4.7 4.7 out of 5 stars 4,127 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Computer Memory by Micron

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4GB

Purchase options and add-ons

Brand Micron
Computer Memory Size 4 GB
RAM Memory Technology DDR3 SODIMM
Memory Speed 1866 MHz
Compatible Devices Laptop

About this item

  • Increases system performance
  • Easy to install
  • Premium quality memory from a trusted brand
  • Laptop/Notebook dual voltage 1.35V/1.5V memory
  • x4Gb based part uses newer technology
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Crucial 4GB Single DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT51264BF186DJ
Crucial 4GB Single DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT51264BF186DJ
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A-Tech 4GB RAM Replacement for Synology D3NS1866L-4G | DDR3/DDR3L 1866 MHz PC3L-14900 SODIMM Non-ECC Unbuffered Memory Compatible for DS620slim, DS918+, DS718+, DS418play, DS218+
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Synology RAM DDR3L-1866 SO-DIMM 4GB (D3NS1866L-4G)
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Price-28% $16.49
List:$22.99
-33% $28.00
List:$41.99
$53.99-15% $29.04
Typical:$33.99
$22.77$69.99
Delivery
Get it as soon as Friday, Mar 29
Get it Apr 2 - 4
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to install
4.8
4.8
4.8
4.8
4.8
4.8
Value for money
4.7
4.7
4.8
4.6
4.7
3.8
For gaming
4.0
4.0
4.3
4.0
Stability
3.6
3.6
4.8
4.4
Battery life
4.5
4.5
4.4
Sold By
MemoryMasters
Aeon Micro, Inc.
Memorybank
BVHB Electronics
A-Tech Components
Amazon.com
computer memory size
4 GB
8 GB
8 GB
16 GB
4 GB
0 TB
memory speed
1866 MHz
1866 MHz
1866 MHz
1600 MHz
1866 MHz
1600 MHz
RAM tech
DDR3 SODIMM
DDR3 SODIMM
DDR3 SODIMM
SDRAM^SODIMM
DDR3
DDR3
number of items
1
1
2
2
1
1
data transfer rate
1866 MHz
1866 MHz
1866 MHz
1600 MHz
14900 megabytes per second
12 gigabits per second
number of pins
204
204
204
204
204
204

From the manufacturer

CRUCIAL LAPTOP MEMORY

The fast, easy way to improve your laptop’s performance

There’s an easy cure for a slow computer: more memory. Designed to help your system run faster and smoother, Crucial Laptop Memory is one of the easiest and most affordable ways to improve your system’s performance. Load programs faster. Increase responsiveness. Run data-intensive applications with ease, and increase your laptop’s multitasking capabilities.

Make everything on your computer faster

Make everything on your computer faster

Multitask with ease

Multitask with ease

Easy to install

Easy to install

Maximize the value of your system

Maximize the value of your system

Make everything on your computer faster

Make everything on your computer faster

The amount of memory in your system plays a critical role in the speed of loading apps, browsing the internet, and editing a spreadsheet. Add more memory for faster performance.

Multitask with ease

Multitask with ease

Every app you’re running requires memory and competes for a limited pool of resources. Overcome this by installing high-density modules in each memory slot for seamless multitasking.

Install with ease – no computer skills required

Install with ease – no computer skills required

With just a screwdriver, your owner’s manual, and a few minutes of time, you can install memory – no computer skills necessary.

Maximize the value of your system

Maximize the value of your system

At a fraction of the cost of a new system, a memory upgrade is one of the most affordable ways to increase performance. Get more out of your notebook by giving it the resources it needs to perform.

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Product information

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here

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Crucial 4GB Single DDR3/DDR3L 1866 MT/s (PC3-14900) Unbuffered SODIMM 204-Pin Memory - CT51264BF186DJ


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What's in the box

  • Internal Memory
  • Product Description

    CT51264BF186DJ is a single 4GB DDR3L Notebook module that operates at speeds up to 1866 MT/s and has a CL13 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non-ECC. It conforms to the industry standard SODIMM layout of 204 pins and is compatible with computers that take DDR3L SODIMM memory.

    Product guides and documents

    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    4,127 global ratings

    Customers say

    Customers like the speed, quality and ease of installation of the internal memory. For example, they mention that it improves computer performance, it's very easy to install and that it works perfectly right out of the box. Customers are also impresseded with the value, saying that it'll be a great buy.

    AI-generated from the text of customer reviews

    327 customers mention309 positive18 negative

    Customers are satisfied with the quality of the memory. They mention that it functions well, their system is running better than ever, and the RAM is working perfectly. Some say that the memory works great right out of the box with zero glitches. Overall, customers are happy with their purchase and recommend it to others.

    "Good price and works!" Read more

    "...So far I have had no problems with these ram units, and everything worked perfectly when I booted up after installing them!..." Read more

    "...months my computer is definitely better behaved and the memory seems more than adequate...." Read more

    "...Works fine, I doubt on an old laptop you'd notice much of a difference." Read more

    118 customers mention109 positive9 negative

    Customers find the internal memory easy to install. They mention that it went in easy as pi. Some say that the memory is a very easy upgrade for most laptops.

    "...This is a very easy upgrade for most laptops... just check your specific model on the Crucial website to be sure you are ordering the correct ram..." Read more

    "About fifteen minutes and I had more memory. Easy install and immediate reading of 24 GB after reboot in "About this Mac." I decided to try..." Read more

    "...It is simple to install, just be sure you don't have any built up static electricity because you can cause latent damage without even knowing it." Read more

    "Very easy to install - shut down my NAS, took the drives out to access the additional memory slot, plugged the memory in, then reassembled the NAS..." Read more

    88 customers mention85 positive3 negative

    Customers appreciate the value of the memory. They say it works first time, is worth the cash, and is a great upgrade for gamers. Some customers also mention that the upgrade was flawless.

    "Good price and works!" Read more

    "...8GB is the max my laptop can support. The upgrade was flawless...." Read more

    "Good value to performance. Perfect compatibility with my old laptop and gave it the speed boost needed." Read more

    "...Great value for my money. I have had this memory in the laptop for many months now with zero issues. Very pleased." Read more

    42 customers mention36 positive6 negative

    Customers like the speed of the internal memory. For example, they say it helps improve computer performance, and their laptop runs smoother now. Some mention that it makes their lightroom workflow a bit quicker. Overall, most are happy with the performance and responsiveness of the product.

    "...Everything will work more smoothly. Just be careful to get the right memory card for your particular Mac release date." Read more

    "...Perfect compatibility with my old laptop and gave it the speed boost needed." Read more

    "...RAM and in just the few days I have used it I can see a huge increase in my laptop speed!" Read more

    "...Linux, one running Windows as a test 28GB of RAM used, the desktop feels just as fast and the virtual machines are responding very nicely as well...." Read more

    21 customers mention17 positive4 negative

    Customers like the fit of the internal memory. For example, they say it fits perfectly, snaps right into place, and is easy to install. Some mention that the price was fair.

    "...This was cheaper alternative and man oh man this card (8gb) snapped right into place...." Read more

    "short and sweet: these are a perfect fit both physically and in specs for my Late-2015 27" iMac Retina...." Read more

    "...This product was described perfectly, the price was fair, and it fit perfectly. Thanks" Read more

    "Works perfectly. Fitment was on point. Added this to the OEM ram that cam with the iMac...." Read more

    21 customers mention21 positive0 negative

    Customers are satisfied with the performance of the memory. They mention that it works perfectly with no issues or glitches. Some customers also say that the memory is reliable and has not thrown any parity errors.

    "...So far I have had no problems with these ram units, and everything worked perfectly when I booted up after installing them!..." Read more

    "...No glitches anymore lags or restarts...." Read more

    "...No glitches, easy install and I'm rocking 32gb of memory on this beast! I have used Crucial in the past and have yet to be let down...." Read more

    "...Worked great right out of the box with zero glitches. Just what you want and expect from the folks at Crucial/Micron. Highly recommended." Read more

    Works great for my iMac Retina 5K 27-inch Late 2015!
    5 Stars
    Works great for my iMac Retina 5K 27-inch Late 2015!
    Works great for my iMac Retina 5K 27-inch Late 2015!
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    Top reviews from the United States

    Reviewed in the United States on November 20, 2023
    Reviewed in the United States on March 2, 2017
    Size: 16GB Kit (8GBx2)Verified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on March 2, 2020
    Reviewed in the United States on August 30, 2019
    Customer image
    5.0 out of 5 stars Works with first gen Chromebox flawlessly.
    Reviewed in the United States on August 30, 2019
    Gotta say I didn't think I would have the best luck because all YT reviews showed same manufacture Ram purchased for second slot. This was cheaper alternative and man oh man this card (8gb) snapped right into place. I ended up switching the old 2gb Ram card from first slot into the secondary slot instead.

    All together I went from 2gb to 10gb (really 9.66gb) Ram and noticed the change instantly. Before I couldn't run YT with other tabs open like Playbooks (no video) without the freezing and asking me to close session after 10min. But when I put in the new card I instantly opened 20 tabs and ran YT with no problem. Even tried Netflix and two tabs with YT(YouTube) in the background paused while watching in another tab and it ran flawless.. In order to see the changes I downloaded the Cog extension from the website because there isn't no way to see Ram in settings on the device. All in all get this card if you have a First gen Chromebox and make sure it is the CT10246BF186D for correct model number for installation. Some will say you don't need this much RAM but who are we kidding with Chrome using so much CPu and Ram to run programs. I am thinking of getting another 8gb to increase to 16gb but we will see
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    Reviewed in the United States on March 24, 2024
    Size: 16GB Kit (8GBx2)Verified Purchase
    Customer image
    5.0 out of 5 stars Works great for my iMac Retina 5K 27-inch Late 2015!
    Reviewed in the United States on March 24, 2024
    Works great for my iMac Retina 5K 27-inch Late 2015!
    Images in this review
    Customer image
    Customer image
    Reviewed in the United States on June 10, 2016
    Size: 16GB Kit (8GBx2)Verified Purchase
    Customer image
    4.0 out of 5 stars MUST READ IF BUY FOR A LATE 2015 27" iMac!!!!
    Reviewed in the United States on June 10, 2016
    I have purchased from both amazon and crucial in the past and can say that I have always been pleased with both companies and their products.

    I recently purchased a late 2015 27" iMac with the base 8GB from Apple as I wanted to avoid the Apple Tax and perform the upgrade myself. I also ordered a set of these from Amazon. After reading the reviews, I was sure these would be the correct memory modules. To my surprise, the DID NOT run at the full 1866Mhz but rather at 1600Mhz (See photos). I called Crucial and they confirmed that although the specs are identical, these are non mac specific memory modules. He also stated that they may have worked for other users but would not recommend them.

    I recalled seeing a very similar product - [ASIN:B0181JTF66 Crucial 16GB Kit (8GBx2) DDR3L 1866 MT/s (PC3-14900) SODIMM 204-Pin Memory For Mac - CT2K8G3S186DM] - and referenced it to the Crucial Support Rep. He then confirmed that these are the ones that are certified to be compatible with Macs. The specs are identical but these are made specifically for Macs.

    Save yourselves the trouble and frustration and get the CT2K8G3S186DM modules instead as they will operate at the full 1866Mhz speed.

    I am only taking out 1 star as I feel that this should be specified in the description but I have no issues with Amazon or Crucial's products or services.
    Images in this review
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    156 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    angelo fallen
    5.0 out of 5 stars EXCELENTES MEMORIAS, LA MEJOR EN EL MERCADO
    Reviewed in Mexico on January 6, 2023
    Size: 16GB Kit (8GBx2)Verified Purchase
    Corbac
    5.0 out of 5 stars upgrade NAS Synology
    Reviewed in Belgium on February 15, 2024
    Size: 16GB Kit (8GBx2)Verified Purchase
    Robert G.
    5.0 out of 5 stars RAM-Upgrade für DS718+
    Reviewed in Germany on January 24, 2024
    Size: 16GB Kit (8GBx2)Verified Purchase
    One person found this helpful
    Report
    Martin
    5.0 out of 5 stars RAS
    Reviewed in France on January 24, 2024
    Clino D'Epiro
    5.0 out of 5 stars Ottimo prodotto
    Reviewed in Italy on November 26, 2023