I'm also having sleep issues with this mother board and Win 7 / 64bit
not sure what's going on.
I removed all USB devices except keyboard and mouse
Nothing in DM is set to wake up computer.
The system goes to sleep (all LED lights on chassis power off. It wakes and then turns off again , wakes and turns off again, comes back on, but the system doesn't fully come on. Screen blank/no keyboard led's
push power button , it goes off. Power button again, Windows starts and says it didn't shut down properly.
Even turned off Speedstep and EPU OFF in the bios.
Anyone else with this mother board see this problem?