Did this happen after you tried a bios update? If so......
Cmos battery might be dead.
__________________
I am the way, the truth and the life.No one comes to the father,
Except through me. John 14:6
Wrench: "When they make an SLI that's not buggy we'll let you know"
OMG: "Noooooppeeee! we build pc's.. we don't manufacture mobo's"