Hi Swedge, If you are trying to setup Raid you need to enter Bios ,Go to Advanced Mode and Advanced Menu>Sata Config>SB Sata config.
Set the Sata mode to Raid Mode and save changes then exit Bios.
Amd option ROM utility should then work.
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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