I got this machine 2 weeks ago with the GA-X79-UD3 (f9 bios). Since day 1 it has had a problem with sleep mode resuming to a unresponsive black screen that then proceeds to go into an endless power cycle that fails to post. The only way to stop it is a hard shut down with the power button. Sometimes the computer will resume from S3 properly, other times it will resume to black screen and loop. It is literally a 50-50 chance. And the timing it decides to fail S3 resume are totally random. Sometimes it will wake fine after an entire night of sleep other times it wont even sleep for 30 minutes without manually waking to a blank screen and reboot loop.
I have literally tinkered with EVERY imaginable setting in my Windows power options to try and fix this, nothing has worked. At all. I recently did a Energy-Report (with cmd) and it gave me 12 errors, 3 for USB devices and 7 errors for items listed in this picture which i have no clue what they actually are, even after researching them on google which provided little info.
Any help would be GREATLY appreciated. As of now my settings for idle are to never allow my computer to sleep and I just have it set to turn the display and hard drives off after a certain time, with the machine staying on. At night I shut it down to s5 (which i hate) but i have no other option really. I dont want it drawing fulll power for 10-12 hours of non-use. ANY help would be greatly appreciated.