I have an Asus p8z77 motherboard that I just upgraded the bios to #1402. I, also, have the gtx 770 GPU, and Corsair Vengence 16 gigs with a Samsung pro 512 gig SSD. My motherboard will not turn on after I installed the bios upgrade. I have a Corsair 860 watt PSU. If I turn all power to the computer (monitor, printer, speakers, etc with the surge protector and then retry, it turns on fine. I think there is a problem with the bios. I get an error code that an Asus applet is not functioning. Try turning off all power to the unit and then try to start it. It worked for me, but I still am searching for the answer so I do not have to use my surge protector on-off to boot my computer.