I've actually had the same issue with my 3800x. I sometimes could press reset and it would boot much further. I think that setting boot voltage for Ram helped me to boot more reliably but I still run into issues when I restart Windows and get qcode 1...
I am actually struggling with the same issue with my new C7H + 3800x + 64GB of ram (DOCP). It seems to work fine with 32GB, but as soon as I put 64GB it happens again. I've downgraded to 2501 bios and the issue seems to have disappeared. In general ...