Crucial RAM 64GB Kit (2x32GB) DDR4 2666 MHz CL19 Memory for Mac CT2K32G4S266M

really, how do you write a 2/3/4-star review of something that either works or doesnt?

It works with iMac 2017 3.8 GHz perfectly, worked from the first time and the iMac booted within a minute

Good price for an easy addition to the iMac. It’s easy to slide into the 27” model. Not sure what installation is like on the 21

Not only did I get these next day (gold star for amazon), but they worked perfectly in my 2017 iMac 5k 27”.

I was able to install this 32 gigs (2×16) on dell 7000 series model i7591.

I installed it myself and it was fairly easy. It worked great. My main concern was that I would order the wrong thing but the specifications in the description were right on.

I replaced the two 4 GB Apple RAM chips with two 16 GB Crucial chips, for a total of 32 GB RAM. I used the same slots (1 and 3). My apps start up a lot faster and my system is more responsive. This is a great upgrade for a relatively low cost.

Wow! After 1 full day of frustration with the Corsair RAM I decided to give up and order this instead. No hassle. Put it in empty slots 2 & 4, with OEM RAM in 1 & 3. Took 17 seconds to initialize on my 2017 5K iMac and boom. Should have ordered this from the very beginning!

Super easy install and took 2019 27 iMac from 8Gb to 40Gb in less than 5 minutes. Fully compatible.

Ordered the memory. It showed up right on time. Super easy to install with zero problems from the computer. Thanks