I have the same board, and the same problem. I have not found a fix. BUT, if I let the system start after sleep mode. Everything appears to come on. I give it a minute. Screens never come on. Wait, wait, wait. nothing. Screens are black. All fans running, all hdd's spin up, Video card fans start,etc.
So after waiting 30 seconds to a minute after machine starts from sleep. Screen are black. If I turn off the main monitor and then turn it back on. The system comes out of sleep and the Windows start sound is all garbled. System appears to start up and run. Well other than the Windows start sounds and having to turn the monitor on/off.
System is running at stock speed except the memory. It also runs extremely cool. Never exceed high 50c under heavy load,Prime95,etc.
G1 Assassin MB
Intel i7 990X
24GB patriot ram @ set to XMP - Profile1 - 1600 MHz/8,9,8,24 - 2T - 1.65v
2 GTX460 - MK-13 Coolers
Cooler Master Silent Pro Gold - 1200W PSU
Corsair H70
Cooler Master Trooper Chassis
bla,bla,bla
ram past all test, several times. I have also tested it an my older Asus Sabertooth MB. That system was overclocked. CPU overclocked to 4.2 GHz and the ram at XMP speeds, same as this one.
I guess I can try the new Beta BIOS...
Anyone have anything???
Thanks