Hi my setup is

GA-Z77X-UD5H F8 Bios
i7-2700k
16GB Corsair Vengeance ram
120GB OCZ SSD
Gigabyte HD6870

The computer will sleep as schedule with no problem but when I try to wake it, it seems like its going to startup for about 3 sec then shuts down. The mouse and keyboard will not work to wake it again. If I press the power button on the case, the computer comes on but nothing displays on the screen. Seems like the only way I can get out of that mode is by pressing the switch on the power supply to kill power then flick it back. It goes into a start stop cycle for about 3 times then boot up fine. Any idea on how to fix this?

_________________
_____________
GA-X58A-UD3R V 2.0 FF Bios, CPU I7 930, HD 5770, 12GB Ram, 1TB HD, Sony DVD.
GA-Z77X-UD5H V 1.0 F7 Bios, CPU I7 2700K, HD 6870, 16GB Ram, 120GB OCZ SSD.

I am experiecing almost the same problem with my setup. It seems like it's entering a deeper sleep state after it went to sleep. I'm not able to wake from that state. If I force shutdown my computer using the power button it will not turn on anymore. To get my machine back to running state, I need to remove and put back the cmos battery because neither cmos reset nor reset button is working fine. So for now, the only option that I enabled to sleep is the display, everything else is configured not to enter sleep state.