Hardware:
* Gigabyte GA-Z170X-Ultra Gaming (Bios' F20, F21, F22, F23d)
* Intel i7-6700k
* MSI GTX 980TI
* Presto Pro Gigabit NIC
Had a working system, did the 12.5 upgrade, rebooted fine installed the updated web drivers, restarted, made the mistake of updating my bios DURING this restart, now...