@cmer I have one question according to Bios settings and Super IO Configuration.
Do you still have option to Disable Serial Port under F11c Bios version? I don't have it and as far as I know it's a bug in this bios version. I think that enabled serial port can be the reason for the longer OS startup time (but not sure).
I've asked local Gigabyte support and they confirmed that there is no option to disable Serial Port under F11c BIOS but they promised to ask their central to add this in the next versions. Hope they will.
@cmer I have one question according to Bios settings and Super IO Configuration. Do you still have option to Disable Serial Port under F11c Bios version? I don't have it and as far as I know it's a bug in this bios version. I think that enabled serial port can be the reason for the longer OS startup time (but not sure).