My specs areneed more info, but reset you CMOS.
https://dlcdnets.asus.com/pub/ASUS/mb/LGA1150/Z97-A/E9378_Z97-A_UG_V2_WEB.pdf
Here is your manual for that motherboard. On page 23. Just do as the manual tells you and you should be fine.
The Optimal setting just tries for an overclock which isn't necessarily stable.
Thank you for your help. I was about to have an heart attack!https://dlcdnets.asus.com/pub/ASUS/mb/LGA1150/Z97-A/E9378_Z97-A_UG_V2_WEB.pdf
Here is your manual for that motherboard. On page 23. Just do as the manual tells you and you should be fine.
The Optimal setting just tries for an overclock which isn't necessarily stable.