How to Upgrade Memory in a 21.5-inch or 27-inch iMac (Mid 2010) - YouTube
How to install ram in an apple 27" imac (mid 2011) - B+C Guides
How to install ram in an apple 27" imac (mid 2011) - B+C Guides
A-Tech 32GB Kit (4x8GB) DDR3 1333MHz RAM for Apple iMac (Mid 2010 27", Mid 2011 21.5"/27") | PC3-10600 SODIMM 204-Pin Max Memory Upgrade at Amazon.com
Upgrading 27" iMac (2011) To 32GB Of RAM - YouTube
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Picked up this iMac (27", mid 2011) i7 @ 3.4GHz , 16 gb ram , 256 SSD in excellent condition for $210. Should I make any upgrades ? GPU, bigger SSD? Thanks : LukeMianiYouTube
Install memory in an iMac - Apple Support
How to Upgrade iMac RAM: 2012-2020: EveryMac.com
Maximum memory for 2011 iMac - Ask Different
New 16GB 4x4GB Memory Apple iMac (21.5 and 27-inch, Mid 2011) PC3-10600 at Amazon.com
How (And Why) To Install More RAM In Your iMac
21.5-inch or 27-inch iMac (Mid 2011) Memory Installation Video - YouTube