Can you change graphics cards in iMac 2012

[r23w]

I know it would be near to impossible, but does anyone know if you could put the Nvidia GeForce GTX Titan in a 27 inch iMac that is housing a Nvidia GTX 680? Are they both the same size card and couldn't you swap them if you could get to them in the computer? I know theres most likely other components in the way, but is the GPU soldered in? And is the Nvidia a custom built GPU or the stock one?

Im not saying I'm going to drop 1k for a gpu but I'm curious.

Thanks

 

[crows]

first of all the iMac gpu is a mobile gpu, and this type of thing would be pretty hard to get the specs for the board to even consider it to be possible, if and when the mobile version of the gpu is released probably won't even have the same pin out.