Yes I have an Asus ST (original legacy PCI version), and it's totally superior to the on-board that's disabled. But then my Creative Titanium HD is superior, my 90's Technics & Pioneer CD players are superior and my Pioneer Amp/Dac's are superior.
And i'll go on stage more, and say I have metal compact cassette tapes (recorded from CD with higher end separates), costing hundreds in the 90's, and the metal compact cassettes sound better and with less background noise than the Gigabyte on-board.
I'm actually planning on making a YouTube video that's compares the Gigabyte on-board audio to high end compact cassette, i'm thinking of calling it 'On board audio sounds worse then compact cassette tape', I would use some licence free YouTube music and A/B between two sources into a high end external DAC receiver.
Ill be leaving my gigabyte audio switched off in the bios...forever
That is certainly shocking to hear that information mind especially given how much most mobo manufactures claim their audio outputs the bees wax.