For 4k you need a graphics card full stop ,you don't need a soundcard.
That board has an headphone amplifier,does 5.1 analog,5.1 via the spdif optical port & upto 9.1 dolby atmos home theatre via the hdmi output.
Adding any modern gpu gives you the same upto 9.1 option via the gpu hdmi output.
Will the gt1030 play fifa 18 at 4k?
Yes id imagine it will at reduced settings, for any other titles at 4k you really need to spend an awful lot of money though - gtx 1070 minimum.
You already own the board I assume ?? As haswell is some 4 years old now & completely discontinued.