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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Friday, Oct 30
Size: 8GB
Style: 2600MHz
Pattern Name: Memory
Features
- Improve your system's responsiveness, run apps faster and multitask with ease
- Install with ease; no computer skills required How-to guides available at Crucial
- Compatibility assurance when using the Crucial System Scanner or Crucial Advisor Tool
- Micron quality and reliability is backed by superior component and module level testing and 42 years of memory expertise
- ECC Type = Non-ECC, Form Factor = UDIMM, Pin Count = 288-pin, PC Speed = PC4-21300, Voltage = 12V, Rank and Configuration = 1Rx16, 1Rx8 or 2Rx8
Description
CT8G4DFRA266 is a 8GB DDR4 desktop module that operates at speeds up to 2666 MT/s and has a CL19 latency. It is an Unbuffered UDIMM. It conforms to the industry standard DDR4 UDIMM layout of 288 pins and is compatible with systems that take DDR4 2666 MT/s UDIMM memory.
Brand: Crucial
Computer Memory Size: 8 GB
RAM Memory Technology: DDR4
Memory Speed: 2666 MHz
Compatible Devices: Desktop
RAM Memory Technology: DDR4
Memory Speed: 2666 MHz
Compatible Devices: Desktop
Additional Features: Lightweight
Voltage: 1.2 volts
Column Address Strobe Latency: 19
Form Factor: 288-Pin_UDIMM
Data Transfer Rate: 1 megabits_per_second
Number of Pins: 288
Memory Form Factor: UDIMM
Memory Generation: DDR4
RAM Size: 8 GB
Brand: Crucial
Model Name: Crucial Memory
UPC: 649528903501
Number of Items: 1
Manufacturer: Crucial
Unit Count: 1 Count
Global Trade Identification Number: 01
Item Weight: 14.2 g
Item Type Name: DDR4 DRAM Memory
Model Number: CT8G4DFRA266
Mfr Part Number: CT8G4DFRA266
Warranty Description: Limited Lifetime Warranty
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Oct 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
PERFECT!!! If you have an HP Pavillion TP01-xxx desktop compuiter; let it be known that this Crucial DR4-2666 MH CL19 DESKTOP MEMORY CT8G4DFRA266 can be installed fairly quickly without having to take anything apart inside. It is a simple matter of putting an anti-static wristband on either wrist; connect the alligator clip to a metal part somewhere within reach of what you are doing. Remove the side cover and if this is not your first time doing this, you should have the computer back together with all your peripherals; mouse; keyboard any USB connectors; HDMI or other video connector to your monitor and be up and running in under 15 minutes. VERY simple. EXTREMELY IMPORTANT NOTE: Installation notes: a. DON'T FORGET THE ANTI-STATIC WRIST STRAP. Also, b. to be safe and not zap your new or old memory module; your motherboard or worse everything inside the casing rendering your PC completely useless: c. even with the wrist band on, to be on the safe side discharge any residual static electricty from yourself; ensure to touch some metal on the pc casing surface before touching anything inside the computer that has a microchip; and that the alligator clip is secure. d. MAKE SURE you are not using a screwdriver or anything else that might fall inside the casing and land on the motherboard or other sensitive component that has a magnetized end. A screwdriver with a magnetized end for example, won't be useful for anything except snagging a hard to get tiny screw or something. Then, except for getting that little screw that magnetized screwdriver end in this example could degauss, or demagnetize something you don't want degaused or demagnetized. As a result, you could very well find yourself holding 600 dollars or so worth of garbage instead of the computer you set out to upgrade. You DO want to upgrade, nopt down grade or degrade altogether, right? Okay. So careful not to have any magnets too close by within your work area while doing your upgrade. Finally, an anti-static wristband if you don't already know can be purchased for under 10 dollars or not much more than 5 or 6 dollars. That small extra amount of money could be the difference between being up and running quickly or without a PC. Don't start the uprade without one. If you are new to this or just haven't done an upgrade for awhile, don't forget someone told you so. I hope you see this and I hope this was helpful to you.
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Reviewed in the United States on February 27, 2021 by William F. Nappi
Hi! Great Upgrade. Made a huge difference. I got this for my desktop (this is for desktops, not laptops). My HP was running super slow—apps were dragging, web pages took forever, and even simple stuff was a pain. Definitely just not enough RAM for what I needed. You probably have at least one memory expansion port in your desktop and so this goes in one of them. Installing it was way easy. You unplug it, take off the case with a screwdriver, find the RAM slots on the motherboard, line up the little notchs, and push it in until it clicks. That's it. It will recognize the new RAM right away. Everything runs smoother now—no more lag, things open fast, and multitasking doesn’t slow it down anymore. If your desktop’s been crawling like mine was, this is 100% worth it.
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Reviewed in the United States on June 25, 2025 by Amazon Customer
After upgrading from Windows 10 to Windows 11 my Dell Inspiron 3670 was running low on available memory. This item matched exactly the specs of the SK Hynix 8GB stick that was already installed. The price was great, and it arrived 3 days sooner than estimated. I was able to install it easily, and now my computer runs like new.
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Reviewed in the United States on November 10, 2025 by J. Wallace
Great product. Highly compatible with most of my motherboards and even when the other RAM you have is from a different brand. Worked great and made my PC faster
Reviewed in the United States on July 13, 2025 by Manuel Salazar
Bought to upgrade my HP gaming Pavillion desktop tg01 0028 from 8 gig to 16 gig. The memory card itself is slightly different then the factory 8 gb ram card and it doesn't have the greatest click which was off putting for me as someone who is just getting into computers, as I didn't want to break anything but as long as you have the card lined up just put even pressure until the tabs lock and you are good to go, the results are nice much smoother game play, along with staying around 50% of use on large games and even better no issues with the using this with the factory 8 bit card
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Reviewed in the United States on June 8, 2022 by Timothy J Coons
I bought this and added it to my Mom's HP i3 Desktop PC. I was getting with how slow it was when I tried to open a photo. Memory is kind of expensive these days and I tried to find a better deal but, this was the best deal that I could find. It's made my Mom's PC load super fast and open pages and surfind the net has been much faster too ever since I added this RAM to her computer. I kept the 4 GB RAM in her PC and the Speccy PC now shows 12 GBs so, this will work with other RAM. I would recommend this if your PC is slow at loading pages or opening up photos.
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Reviewed in the United States on November 17, 2020 by D. Smith
The Crucial RAM 8GB DDR4 2666 MHz CL19 Desktop Memory CT8G4DFRA266 was purchased to be compatible with the 8 GB RAM already installed on my Dell 3670 PC. It was installed successfully and found to be fully compatible. This upgrade could have gone more smoothly if the new card was fully engaged during its initial installation. The first installation resulted in the PC’s power button light flashing 2 then 7 orange lights repeatedly. Dell 3670 User’s Manual signifies this as a “RAM FAILURE”. Upon a closer examination of the installation, it was noticed that one of the hold-down clamps securing the new card (in slot #2) was not quite fully closed. To address this, the card was removed and then re-installed to ensure complete closer of both clamps. That resolved the issue. View photos to see how just a little lack of clamp closer can result in an unacceptable installation.
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Reviewed in the United States on May 26, 2024 by Bob, the engineer
Crucial brand RAM has been around a long time. Some of the best prices and most reliable RAM you can get. Its not fancy, but it works. Its been my go to RAM for I want to say 30 years now. I have never had any issues with their RAM. As all the rest of the Crucial RAM in my past, this one fit into my computer easily and works perfectly. Just make sure you get the correct type and speed of RAM for your computer's motherboard.
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Reviewed in the United States on February 3, 2023 by C. Berry