Amazon.com: Valley Of The Sun 2GB Graphics Video Card Upgrade for Apple iMac Mid-2011 27 Inch Core i5 MC814LL/A MC814 A1312 Desktop All-in-One PC, AMD Mobility Radeon HD 6970M Replacement Repair Parts :
Apple iMac (21.5-inch, Mid 2011) Serial Number Lookup - AppleSN.info
2011 iMac 21.5” CPU Upgrade Full Tutorial! - YouTube
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 : r/LukeMianiYouTube
Upgrade iMac Intel Core i3 CPU to Core i7 - iFixit Repair Guide
There is no "I" in Steve: iMac 21.5" mid 2011 CPU Upgrade and Repair
2011 iMac CPU Upgrade - will a Xeon work? Also how about a k2100m at the same time! - YouTube