Configured the new build tonight.
Its working perfectly so far, no issues. More than can be said for the Asus software install!
Speakers connect to line out at the back via 3.5mm
Headphones and mic connect at the front via 3.5mm
Dolby Atomos enabled in Dolby access
Sound blaster command I have SBX profile rubbish off.
You switch between headphones and speakers in the playback tab
AKG 702 headphones -
https://www.akg.com/Headphones/Professional Headphones/K702.html
iLoud Micro monitor speakers -
https://www.ikmultimedia.com/products/iloudmm/