B85-DGS Bios update

[Ciprian Stefan Andrei]

My options for overclocking CPU dissapeared after bios update from 1.00 to 1.50(Lastest Bios version). I tried to downgrade bios to 1.00 and my overclock options came back. But if I try to upgrade again to 1.50 CPU overclock options will dissapear.
MotherBoard: Asrock B85-DGS.