Thanks all for sharing their thoughts.
@iamnoobplzhelp
My power Corsair AX 1500 and my cards are seated on the mobo directly.

@TimeTeller
Thank you for sharing that

@adaseb
why shouldn't i mine ZEC ? i am seeing good progress on it

I am dual mining ETH+SIA and i'm afraid to touch my bios cause i don't want to void the cards warranty.