Crucial 32GB Kit (16GB x 2) DDR4 2666 MT/s (PC4-21300) SODIMM 260-Pin Memory - CT2K16G4SFRA266

As the title states this memory works well and is easy to install on a 2019 27" iMac. Follow the install instructions on the internet or from the "About this Mac" upgrade instructions. After opening the back cover and lifting the lock tabs that hold the memory just place the new ones in the empty slots. You don't have to remove the original 2 X 8GB memory cards. Leave them in and add these two. I first removed the two 4gb cards and then put the new ones in. This is not necessary. Later I added back the 2 X 4gb the computer came with. My computer works fine and seems much quicker on startup in general and Fidelity ATP. Make sure you are grounded when installing the memory so you don't get a static discharge and possibly blow out the circuit boards. These two cards give a total of 40gb of RAM when installed with the factory memory. The photo above shows from the About my Mac.

Installed in a Synology DS723+ NAS, worked immediately with no warnings. (If you are using one of those, just remember to seat the RAM at about a 30 degree angle, then push it flat to grab it. It's useful to watch an install video to visualize this.)

Works perfectly in my QNAP TVS-672N NAS. Now I have the maximum amount of RAM installed For the model and it’s also faster speed then the RAM that came with it. No more locking/Freezing up the NAS unit when performing too many tasks at once. Well worth the cost of the upgrade from 4GB to 32GB and increase in performance.

I purchased this 32GB kit to upgrade and max out my computer memory as it only had 8GB and was hoping that this would also allow me have a better gaming experience on my computer and while overall computer performance has improved considerably after installing these memory modules, a dedicated graphics card is still needed to be able to play high end graphic games but since I have a mini pc which graphics card cannot be upgraded, I will have to buy a gaming PC if I want to be able to play graphic intense games on PC. With that being said, I am pleased with these memory modules and that I was able to install them myself with no issues and still be able to notice the benefits of having more memory. If you want to improve your computer's performance and not worry about how many apps or windows you have open at once, buy these but be sure they will work on your computer you get them as computers use different memory types and sizes.

This stick of memory, recommended by the manufacturer for the laptop I was upgrading "just worked" - I've tried upgrades for older laptop and tower machines in other cases, and had mysterious issues - so this was a pleasant experience. Nice.

Did an upgrade last year, and so far so good.

I got what I ordered at a good price, and they made sure I knew when to expect it.

I put 32GB of Crucial RAM into a 2018 Mac Mini (bought it from Apple in Sept 2020), it works at 2667Mhz right after installation. The installation process is easy, you just need to follow the iFixit guide. There's really no need to pay Apple for RAM upgrades, or trying to live with the 8GB RAM that comes default with Mac Mini. The first boot up after RAM installation does take longer to get the Apple logo to appear, so don't worry about it. For those of you who think 32GB is too much, it is actually necessary for your daily use: on my 4K display, I opened 7 tabs of Google Maps 3D satellite view and 3 windows of Apple Maps 3D satellite view, my RAM usage is at 25GB, I haven't even launched other apps yet. I highly recommend this Crucial 32GB RAM kit to 2018 Mac mini users to increase performance and future-proof your Mac mini.