Upgrading Apple iMac 2011 27 Hard Drive to SSD, Huge Improvement - YouTube
Apple iMac 2011 (Mid) 27-inch 2K (iMac 12,2) SSD ,Ram & OSX Upgrades - ZD Laptop Service Centre
OWC Hard Drive Upgrade Kit for Apple iMac 2011
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
HOW TO] iMac 27" (mid 2011) two SSDs in RAID 0 config + HDD | MacRumors Forums