Is it ok to add an 8gb ram module to a mid 2011 iMac 21inch computer?

Answer 1

Yes. But I suggest you go to crucial and click the download scanner button. They will scan your Mac, tell you what you now have, and what you can install. Their prices are very competitive and the site is safe to use. I have bought ram from them many times.

Answer 2

There are a number of variants to the mid-2011 iMac 21.5-inch, but they all can be upgraded up to 32 GB of RAM. There are 4 slots, but you can basically install 4 8 GB RAM modules and it will function normally.

Answer 3

http://www.crucial.com/usa/en/compatible-upgrade-for/Apple/imac-%2821*5-and-27-inch%2C-mid-2011%29