Dell R730 with consumer grade GPU

Hey,

Although it's officially not supported, would I be able to install a consumer grade GPU such as 980GTX or Titan X into one of those (Configured with a thermal profile for 2CPUs + GPU)?

I have done that before on R720 with GTX Titan and it works quite well. Is there anything that I should worry about (Such as space inside the server)?

Thanks,

Nick