






⚡ Upgrade your laptop’s brainpower — don’t get left behind!
The Crucial CT8G4SFRA266 is an 8GB DDR4 SO-DIMM laptop memory module running at 2666 MHz with CL19 latency. It delivers up to 30% increased bandwidth and reduces power consumption by 40%, optimized for next-generation processors. Lightweight and easy to install, it’s a reliable upgrade backed by a limited lifetime warranty and a strong 4.7-star user rating.







| ASIN | B08C56KXQJ |
| Best Sellers Rank | 14,862 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 56 in Computer Memory |
| Brand Name | Crucial |
| Column Address Strobe Latency | CL19 |
| Compatible Devices | Laptop |
| Customer Reviews | 4.8 4.8 out of 5 stars (24,525) |
| Data Transfer Rate | 34652.48 Megabits Per Second |
| Form Factor | SO-DIMM |
| Global Trade Identification Number | 00649528903488 |
| Item Weight | 0.3 Ounces |
| Manufacturer | Crucial |
| Manufacturer Part Number | CT8G4SFRA266 |
| Memory Form Factor | SODIMM |
| Memory Generation | DDR4 |
| Memory Speed | 2666 MHz |
| Model Name | Crucial 2666 MT/s SODIMMS |
| Model Number | CT8G4SFRA266 |
| Number of Pins | 260 |
| Product Features | Non Ecc |
| Product Warranty | Limited Lifetime Warranty |
| RAM Memory Technology | SO-DIMM |
| RAM Size | 8 GB |
| UPC | 649528903488 |
| Unit Count | 1.0 count |
| Voltage | 1.2 Volts |
T**.
It can work with Synology
I bought an 8GB RAM (part number: CT8G4SFRA266 2666MHz CL19 ) to extend the RAM of my Synology DS220+ NAS. Although Synology says the system supports up to 6 GB of RAM (2GB is included in the original box), the system actually supports more than that. You can add at least another 16GB of RAM to use as a cache to boost up the performance. I have read the previous comments – some claimed that CT8G4SFRA266 does not fit with Synology. This is not true. Mine works very well on DS220+. There are two possibilities why some people found it was not working: 1. They didn't correctly insert the RAM. You will need to first push the RAM very hard until hearing a clicking before lowering the RAM to sit on the RAM slot. There are many posts online where people claim the RAM doesn't work just because they didn't currently insert the RAM. 2. There are different variants of the Crucial memory "FRA266". Upon receiving the RAM, you will find that the RAM has another four digitals part number printed on the tag. Mine is shown in the photo, which is C8FR. This means the RAM is built using 8x 1GB memory cells, where both sides of the RAM have memory cells. This will work on Synology. This part number can also be C8FJ, which will also work too. However, if this part number is C4FE, it means the RAM is built using 4x 2GB memory cells, where the memory cells are sodered on just one side of the RAM. In this case, it won't be compatible with Synology. Unfortunately, you will not get to see this part number until you receive the RAM. I suspect this applies to the 16GB RAM, too, as there are some people online saying it works for Synology while others saying it doesn't. Overall, I am pleased with this purchase.
M**I
Great piece of kit
I brought this RAM one stick 16GB at 2666MHZ on the 1 of January 2021. I used it in conjuction with a single 8GB RAM already installed on my Gaming laptop. Nearly two years later and still going strong. I still get 60+FPS on games even though I use two different types of RAM sizes. Gaming performance never suffered. Its a plug and play type of kit, just install it into the memory banks and you're good to go. It came in anti static packaging so no need to worry about that like other sellers. Just ensure that you get that right type for your PC DDR4 and speed 2666MHZ. If your current ram is slower like 2400MHZ then your PC will automatically downclock the RAM to 2400MHZ or to whatever the slowest speed of your RAM is. So it is vital that your get the right type and right speed for your PC for value for money. Hope this helps.
A**H
Works on iMac Retina 5K 27-inch - 2020
I upgraded from 8GB to 32GB (2x16GB). This wasn't the official recommended upgrade kit for the iMac Retina 5K 27-inch - 2020. However the spec was exactly the same and the price was much cheaper. Therefore, I decided to give it a go and I am really pleased I did. I watched a video on YouTube and it took less than 5 minutes to fit. The iMac has a little container on the back with a door that you release using a button under the power lead. Press the button, pop the old memory modules out, pop the new ones in - job done. I'm so please I upgraded.
C**S
Rest in peace, crucial
Ram worked perfectly. Shame that it's impossible to find now.
M**S
Its a RAM Stick
I doubt you have the exact same motherboard as me, but this specific ram is great and it does what ram does it gave me extra ram storage and my pc ran more smoothly after. Of course it was very expensive for £50+ but If your desperate. Go for it
E**T
The best thing you can do for a computer from one of the best suppliers in the business.
Over something getting on for 30 years of building (and occasionally breaking!) computers, a few companies have really stood the test of time when it comes to supplying top quality gear. Crucial is one of those companies and should be in anyone's (very) short list of memory suppliers. This was purchased to to expand the memory of an older Dell Vostro laptop from 8gb to 16gb. This simple upgrade has made the user of the laptop much happier and given it a new lease of life. They were convinced they needed a new laptop until I persuaded them to give this a go! Unless you are a gamer pushing the limits of your machine, a memory upgrade should be the first option if you think it is time to replace the computer. Crucial have a nifty system checker program on their website that will tell you what you need and what the system can support. Strangely you can then usually buy the same memory cheaper on Amazon! Oh and there is no great skill required to upgrade the memory in a pc/laptop. A screwdriver and a modicum of common sense will usually suffice, but in addition there are loads of videos to guide you through it.
M**S
Amazing Value but prefomance is what you payed for
I got it for under twenty five pounds , it was for a laptop upgrade , a laptop that came with only 4GB Stick , now it has 12GB . The CL19 latency at this speed is not amazing , I run a kit at home that runs at 3600MHz with CL16 . Over all , fantastic cheap upgrade for a cheap laptop :) , will not break the bank.
C**W
Marvellous memory
Having purchased an HP 14s-dq1505sa laptop with 8GB ram, I checked the compatibility and found that it was upgradable to 32GB ram so decided to purchase two of these 16GB Crucial memory modules to replace the 2 x 4GB modules already installed. I found them well-packaged in antistatic packaging and of course very easy to install. There's not a lot you can say about memory modules except that they work perfectly and have done from the first time switching on the laptop. The photographs in the listing are an accurate representation of what you will receive. Just make sure to check and double check that you purchase the right ones and I'm sure you'll find that a DIY upgrade is much cheaper in most cases than paying for a higher specification from a company.
N**F
This memory module works perfect 👌 on all my upgraded laptops. Thank Crucial for best price 👍 with good performance 👏
I**A
Comprei um memória de 16GB para expandir a memória total do meu laptop pra 24GB. Fiz uma pesquisa extensa antes para saber quais as melhores marcas de memória RAM, e a Crucial foi uma das principais recomendações. Tem três semanas que meu laptop está rodando com a memória nova, e consigo usar máquina virtual, rodar programas da Adobe e jogar jogos tranquilamente. Super recomendo! A instalação no slot foi bem simples de fazer, porém encontrei um problema com o Windows, que se recusava a incializar após eu inserir a memória nova. Fui descobrir que era uma reclamação de paridade do próprio Windows mesmo, pois os slots de RAM do meu laptop estavam com 16 x 8, e o recomendado é sempre ser duas memórias de capacidades iguals, 8x8, 16x16, etc. Após configurar o Windows para aceitar a configuração 16x8, ele inicializou normalmente, e desde então, não tive mais problemas.
S**M
Satisfied
O**T
I got this RAM because I got a 2020 iMac 27"... and it works perfectly! I took out the factory 2x 4GB and replaced it with this Crucial 32GB and I am very satisfied. The replies from the company to questions asked on Amazon also helped me cement my decision. They are very helpful.
A**K
Habe den RAM als Erweiterung für mein Synology DS224+ gekauft – wurde sofort erkannt und läuft absolut stabil. Der Einbau war unkompliziert und in wenigen Minuten erledigt. Seit dem Upgrade läuft das NAS spürbar flüssiger, gerade bei mehreren gleichzeitig laufenden Diensten. Gute Qualität, fairer Preis und zuverlässige Leistung – genau das, was man sich von Crucial erwartet. Klare Kaufempfehlung für alle, die ihr NAS aufrüsten möchten!
Trustpilot
2 months ago
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