Your not the only one with Bios issues, many regarding USB Flashback via IO rear panel.
Would you believe i'm still on 0804 original and as i'm having no issues i'm not going to touch it.
My system is performing well with a 4.2 OC and 3200MHz RAM frequency.
Have you tried EZ Flash3 utility in Bios and don't forget, Bios will go back to default with an update so you will have to manually enter your SPD values again.
We owe our existence to the scum of the earth, Cyanobacteria
My System Specs:
MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
CPU:AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t
Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2
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