Hey, I've been looking for someone with a Biostar X370GTN - who has updated the BIOS to enabled the 5000 series CPUs on it - how did you do it?? When I try, the bios flasher doesn't believe that the BIOS file I am presenting is correct (though it is absolutely downloaded from the Biostar site - X37AK523 or even X37AK305, Biostar tech support have been useless, pointing me at an FAQ of "how to update the bios" 
