Everytime I turn on my computer there's always a message appear like this:
"OC fail, please enter setup to change OC fail setting" (if I'm not mistaken)
And then there're 2 options, press F1 to continue or press Del to enter Setup.
If press F1 it can continue as usual; if I press Del, I don't know what setting to change to get rid of the message.

Somebody please help me.
Thanks in advance!

Over Clocking failed.

Go into Setup and set all Defaults.

A belated thanks for your advice, Jephree.

Sorry for coming back to this thread late.
I've set default for all the settings but the problem persists.
However, I think it's not a big deal since everything else works normal after I press F1 button.

Thanks for the thanks!

Is everything working OK now?

F1 is a general by-pass at the BIOS level.

If your BIOS does not exactly see some hardware as it expects to see it: it registers this complaint.

You will also find in your BIOS Setup an option to refrain from F1 error messages.