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
2nd 2.5'' SATA HDD SSD Hard Drive Disk DVD CD ROM Optical SuperDrive Caddy Tray Adapter for Apple Unibody MacBook/MacBook Pro 13 15 17 Early mid Late 2008 2009 2010 2011 2012.etc : Electronics
OWC Data Doubler Optical Bay Hard Drive/SSD Mounting
Optical Bay Hard Drive or SSD Mounting Solution for iMac
iMac 2011 27" Apple stock SSD swap | MacRumors Forums
Amazon.com: Internal 8X DL DVD Burner SuperDrive Replacement for Apple MacBook Pro Unibody Late 2011 13 Inch 13" Laptop A1278 MD313LL/A MD314LL/A, Super Multi DVD+-R CD-RW Writer Optical Drive : Electronics