I just built a system with a Asus TUF X299 Mark 1 i7 7800x 32GB DDR4 (3200) I wounding if anything can be done about he following issues

1. The system takes 10 secs to POST on power up

2. *Sometimes after rebooing from windows i just get blank screen and press reset will do nothing. Only way to fix this is force power off and back on
*

I m running latest bios 0802 and not sure what to do

Thanks *