There is a strong likelyhood that the discreet graphics card causes a 2012 MBP to heat up, and hence cause the fans to kick in. I'm really so frustrated by this activity, I could cry. Can't stand the fact that the I5/I7 CPU, can't be underclocked or undervolted at all, so wondered if the discreet graphics card (AMD Radeon HD 6770M) could be perhaps as a secondary solution? Now I could just use integrated only mode, using a tool like gfxCardStatus (http://codykrieger.com/gfxCardStatus), however that means I loose my Thunderbolt display, as it needs the discreet card to operate. Does anyone know if it is in theory possible to underclock or undervolt the GPU? I would pay up to $1000 for a solution. I'm that desperate. I just can't work with these fans going on and off all the time. Feel really let down by Apple, and considering going back to a Core2 Duo.