| RAM | 16 GB DDR4 |
|---|---|
| Memory Speed | 2666 MHz |
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This Item  Crucial RAM 16GB Kit (2x8GB) DDR4 2666 MHz CL19 Memory for Mac CT2K8G4S266M |  |  |  |  |  | |
| Price | -9% $41.13 List: $44.99 | -38% $58.99 List: $94.99 | $33.99 | $48.74 | $45.88 | $78.99 |
| Delivery | Get it as soon as Saturday, May 4 | Get it as soon as Saturday, May 4 | Get it as soon as Friday, May 3 | Get it as soon as Saturday, May 4 | Get it as soon as Saturday, May 4 | Get it as soon as Saturday, May 4 |
| Customer Ratings | ||||||
| Easy to install | ||||||
| Value for money | ||||||
| For gaming | ||||||
| Stability | ||||||
| Tech Support | ||||||
| Sold By | Amazon.com | Amazon.com | Timetec International Inc | A-Tech Components | A-Tech Components | OWC (Other World Computing) |
| computer memory size | 16 GB | 32 GB | 16 GB | 16 GB | 16 GB | 32 GB |
| memory speed | 2666 MHz | 3200 mt s | 3200 microhertz | 3200 MHz | 2666 MHz | 1333 MHz |
| RAM tech | DDR4 | DDR4 | DDR4 3200 RAM | DDR4 | DDR4 | DDR4 |
| number of items | 1 | 2 | 1 | 1 | 2 | 2 |
| data transfer rate | 2666 MHz | 3200 mt s | 3200 MHz | 3200 MHz | 21300 megabytes per second | 2666 MHz |
| number of pins | 260 | 288 | 260 | 260 | 260 | 260 |
From the manufacturer
Compatible with Mac systems
Take the guesswork out of upgrading your Mac with Crucial memory for Mac systems. Since Apple computers often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it’s important to use memory that’s engineered for your Mac. With more than a decade of experience manufacturing and developing memory for all types of Apple computers, Crucial makes adding memory the easiest way to upgrade your Mac.
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Reliability for Mac systemsWhen you use your Mac system, you expect intuitive, dependable performance. Expect the same out of your memory. Every Crucial module that leaves our doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility. |
Speed for Mac systemsA memory upgrade is the fastest, easiest, and most affordable way to get more performance out of your Mac system. Upgrade your Mac with Crucial memory modules and maximize your creativity with top speed and high density DDR3 and DDR4 memory modules. |
Support for Mac systemsUnsure how to install memory or have an important question about your Mac system? Let the Crucial experts help! They know Apple systems inside and out and enjoy providing helpful, friendly technical support. Whether it's phone support, videos, FAQ articles, or do-it-yourself install guides for more than 70 different Mac systems, Crucial has the resources you need to keep your system up to speed. |
Micron quality – A higher level of reliabilityAs a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory for Mac systems is backed by the same quality and innovation that has produced some of the world’s most advanced memory and storage technologies. With a product portfolio that includes upgrades for more than 100,000 systems, we’ve got one specifically designed for your Mac system. |
Videos
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Videos for this product
1:11
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Great memory for upgrading certain Synology NAS enclosures
Troy Rutter
Videos for this product
2:26
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Installation Guide: How to Install Crucial DDR4 RAM 260-pin
Kasper
Videos for this product
0:26
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This RAM upgrade will speed up both your Mac and Windows PC
Kasper
Videos for this product
2:02
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Upgrading synology DS220+ demo - fast and easy
Troy Rutter
Reviews with images
Caused Loud & Random Fan Noise After Installed In iMac...
Having installed Crucial RAM in at least two other iMacs in the past with no issues, and after reading reviews by other satisfied buyers who had the same model Mac (2017 4.2ghz, i7 2TB), I was not expecting to experience any performance problems.I bought the mint-condition Mac off eBay, and decided to add some extra memory to the original 16g of RAM to allow for more headroom for use with a DAW, as the activity monitor consistently showed about 14 gigs being used with just a few programs open.However, soon after installing, the Mac started acting strangely…Whereas the computer was completely mouse-silent before adding the new RAM, after installation, the fan would randomly kick on and the Mac would seem to be gasping for breath even during non-memory intensive operations.At first it didn’t occur to me that the new modules could be the issue, but after calling Apple and executing some basic troubleshooting, I decided to remove it - and sure enough, the Mac was completely silent again - even with several apps open during export operations. It was conclusive - there was definitely a conflict with this particular RAM.So called Crucial directly to get their opinion, and they suggested that mostly likely the memory was bad, and advised returning and replacing. So planning to do just that, or try a different brand like Kingston…p.s. In the photo, the label on the plastic container said “Notebook” which initially made me think that I was sent the wrong memory for this Mac, but the Crucial rep said it didn’t matter, and should also work for my system.UPDATE: Received the replacement RAM, which I first installed along with the original 16g (2x8) Apple memory, and the result was an unresponsive, dormant black screen. After trying each possible configuration of installing the RAM with no success, I finally decided to remove the Apple memory and just leave in the new Crucial pair of 2 16g sticks - and now everything runs as silent and smoothly as I was expecting. So for now, must conclude that these two particular Crucial modules don't "play nicely" with the original Apple ones (have read a few other buyers making similar conclusions). Not the best outcome, but still an improvement in function overall, so considering adding another matching pair of 16 and will see how that goes.
Top reviews from the United States
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Reviewed in the United States on March 30, 2024
Size: 32GB Kit (2x16GB)Style: 2400MHzVerified Purchase
Reviewed in the United States on February 10, 2024
Size: 16GB Kit (2x8GB)Style: 2666MHzVerified Purchase
Reviewed in the United States on November 25, 2023
Size: 64GB Kit (2x32GB)Style: 2666MHzVerified Purchase
Reviewed in the United States on March 13, 2023
Size: 32GB Kit (2x16GB)Style: 2400MHzVerified Purchase
Reviewed in the United States on July 30, 2023
Size: 64GB Kit (2x32GB)Style: 2666MHzVerified Purchase
Reviewed in the United States on April 16, 2024
I bought the mint-condition Mac off eBay, and decided to add some extra memory to the original 16g of RAM to allow for more headroom for use with a DAW, as the activity monitor consistently showed about 14 gigs being used with just a few programs open.
However, soon after installing, the Mac started acting strangely…
Whereas the computer was completely mouse-silent before adding the new RAM, after installation, the fan would randomly kick on and the Mac would seem to be gasping for breath even during non-memory intensive operations.
At first it didn’t occur to me that the new modules could be the issue, but after calling Apple and executing some basic troubleshooting, I decided to remove it - and sure enough, the Mac was completely silent again - even with several apps open during export operations. It was conclusive - there was definitely a conflict with this particular RAM.
So called Crucial directly to get their opinion, and they suggested that mostly likely the memory was bad, and advised returning and replacing. So planning to do just that, or try a different brand like Kingston…
p.s. In the photo, the label on the plastic container said “Notebook” which initially made me think that I was sent the wrong memory for this Mac, but the Crucial rep said it didn’t matter, and should also work for my system.
UPDATE: Received the replacement RAM, which I first installed along with the original 16g (2x8) Apple memory, and the result was an unresponsive, dormant black screen. After trying each possible configuration of installing the RAM with no success, I finally decided to remove the Apple memory and just leave in the new Crucial pair of 2 16g sticks - and now everything runs as silent and smoothly as I was expecting. So for now, must conclude that these two particular Crucial modules don't "play nicely" with the original Apple ones (have read a few other buyers making similar conclusions). Not the best outcome, but still an improvement in function overall, so considering adding another matching pair of 16 and will see how that goes.
Size: 32GB Kit (2x16GB)Style: 2400MHzVerified Purchase
Caused Loud & Random Fan Noise After Installed In iMac...
Reviewed in the United States on April 16, 2024
Having installed Crucial RAM in at least two other iMacs in the past with no issues, and after reading reviews by other satisfied buyers who had the same model Mac (2017 4.2ghz, i7 2TB), I was not expecting to experience any performance problems.Reviewed in the United States on April 16, 2024
I bought the mint-condition Mac off eBay, and decided to add some extra memory to the original 16g of RAM to allow for more headroom for use with a DAW, as the activity monitor consistently showed about 14 gigs being used with just a few programs open.
However, soon after installing, the Mac started acting strangely…
Whereas the computer was completely mouse-silent before adding the new RAM, after installation, the fan would randomly kick on and the Mac would seem to be gasping for breath even during non-memory intensive operations.
At first it didn’t occur to me that the new modules could be the issue, but after calling Apple and executing some basic troubleshooting, I decided to remove it - and sure enough, the Mac was completely silent again - even with several apps open during export operations. It was conclusive - there was definitely a conflict with this particular RAM.
So called Crucial directly to get their opinion, and they suggested that mostly likely the memory was bad, and advised returning and replacing. So planning to do just that, or try a different brand like Kingston…
p.s. In the photo, the label on the plastic container said “Notebook” which initially made me think that I was sent the wrong memory for this Mac, but the Crucial rep said it didn’t matter, and should also work for my system.
UPDATE: Received the replacement RAM, which I first installed along with the original 16g (2x8) Apple memory, and the result was an unresponsive, dormant black screen. After trying each possible configuration of installing the RAM with no success, I finally decided to remove the Apple memory and just leave in the new Crucial pair of 2 16g sticks - and now everything runs as silent and smoothly as I was expecting. So for now, must conclude that these two particular Crucial modules don't "play nicely" with the original Apple ones (have read a few other buyers making similar conclusions). Not the best outcome, but still an improvement in function overall, so considering adding another matching pair of 16 and will see how that goes.
Images in this review
Reviewed in the United States on August 4, 2023
Size: 16GB Kit (2x8GB)Style: 2666MHzVerified Purchase
Top reviews from other countries
Steve W
Quality Ram from crucial
Reviewed in Canada on December 16, 2023Size: 16GB Kit (2x8GB)Style: 2666MHzVerified Purchase
David
La mejor memoria que tu Mac puede tener!!
Reviewed in Mexico on September 30, 2023Size: 64GB Kit (2x32GB)Style: 2666MHzVerified Purchase
David
Reviewed in Mexico on September 30, 2023
Images in this review
Gucs
Amplia compatibilidad en equipos Mac
Reviewed in Mexico on August 14, 2023Size: 16GBStyle: 2666MHzVerified Purchase
M Claverie
Top👍
Reviewed in Belgium on April 3, 2024Size: 32GB Kit (2x16GB)Style: 2666MHzVerified Purchase
Gianpaolo
Perfettamente compatibili con il mio IMac (27" del 2019)
Reviewed in Italy on March 16, 2024Size: 32GB Kit (2x16GB)Style: 2666MHzVerified Purchase
