Hello everybody... I have the same problem with Asus P8Z77-V, i5 2500K and bios 0906... I update bios to 1050, but still problem... Any idea...?
I solved my problem with a complete Cmos reset and eliminated all overclocking (which I hadn't realized had somehow been applied in my early mucking around.) hasn't happened since. I have been VERY CAREFULLY reapplying a limited amount of overclocking since, and it hasn't reoccurred.