Replaced broken stock drive with 2TB Western Digital Gold and OWC In-Line Digital Thermal Sensor HDD Upgrade Cable for iMac 2011 (model # OWCDIDIMACHDD11) using this procedure. You definitely do not need to remove the whole screen. Just lift the top edge, remove a single cable (the vertical sync cable) and then prop the screen up on both corners - the idea of using two BIC pens worked for me. All worked fine, no fan speed issues.
Replaced broken stock drive with 2TB Western Digital Gold and OWC In-Line Digital Thermal Sensor HDD Upgrade Cable for iMac 2011 (model # OWCDIDIMACHDD11) using this procedure. You definitely do not need to remove the whole screen. Just lift the top edge, remove a single cable (the vertical sync cable) and then prop the screen up on both corners - the idea of using two BIC pens worked for me. All worked fine, no fan speed issues.