Yes, the 860M should work but I'd suggest a 970M or the Quadro M3000M or M4000M. These Quadro cards are great value on ebay and they are equivalent to the 965M and 970M. Yes, I can mod drivers and I'll be happy to help you through the process.
Hi, does anyone know if the card will work with my Alienware M15x R1? I heard that you need to mod drivers but all links that were available now lead to nothing, does any one know how to mod drivers? Windows 10 if someone asks 
M15x R1, Nvidia 860M?