I have a i5 6400t, it seems to have no problem with DSD 256 2 channel and any of the poly filters. I'm guessing with the higher clock and larger cache, the 4790t should handle this well.
Jesus,
have you you been able to test the new 3.2.1 NAA? On the HQPlayer Facebook page, Jussi states it improves dac hot plug behavior with latest HQPlayer.