Why can't you access the bios? I have the same board as you. You have to hold "del" during the whole time to access the bios. Or are you locked out? you can clear the bios, it's one of the jumpers in the mobo, look at your manual.
thank you for your reply
I can't access the bios because this machine is 1000 Km away from me, it is located in a datacenter.
I would really appreciate if you could look at your mobo and find out the clock generator model