Per his model number and maker, it should be this one:

https://www.asus.com/Notebooks_Ultra...US_ROG_G750JX/

Which states a GTX 780...

I've got no idea how this particular 'gaming' laptop performs, but there should be some other owners out there.

My little ThinkPad X series runs the game just fine on DX9; not yet tried DX11... but at least the DX9 client is fairly playable for basic play.