P5E3 Deluxe & System won't boot?

[Trivia89]

Hi there!
I've got a little problem with my mobo... it works pretty well except for the thing that, sometimes, it just won't boot!

I hear the noise of the fans and nothing else, the screen is black and no beep come from the mobo.

Shutting it down 1 or 2 times it "beeps" and after a pair of seconds of post, it gives the error:

Overclocking Failed! Press F1 to reconfigure your PC settings!

However, i have this problem even with everything @ default!
Is there some BIOS setting on wich i could blame this?
Thank you =)