I'm having a hard time finding what the system requirements are for this game, mainly what is the recommended minimum video card. I am currently able to run the game flawlessly at 4K/60Hz using a Radeon R9 270 with everything turned all the way up.
However, I'm about to build a new PC for a friend and he's on a budget. He will have a 4K/60Hz monitor. Do you think the GTX 7XX series will suffice? (GTX 730,750, etc.)

Thanks in a advance!