Will the display of a mid-2010 iMac 27' work when placed in a mid-2011 iMac 27'? - Quora
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
iMac Mid 2010 21.5" Upgrade Kit - Real Mac Mods
What Does It Take To Upgrade a 2012 iMac 21.5"?
Can a mid 2010 imac 21.5 inch with an upg… - Apple Community
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :
iMac (mid 2010) Core i3 review | Engadget
CPU Fan for iMac 21.5" A1311 (Late 2009-Late 2011)
922-9385 Apple CPU Fan for iMac (21.5-inch Mid 2010) iMac (21.5-inch Mid 2011)