I think that this is after a looong time really interesting: http://www.eevblog.com/forum/projects/hacking-nvidia-cards-into-their-professional-counterparts/
yeah it is, see update to the thread on eevblog - gtx 680 succesfully modded and 670 should be in near future... but I think gtx690 is really interesting - to have 2x Quadro or Tesla...