Having the exact same problem with a brand new Crosshair VIII Hero and made my own post on it yesterday. If you do a search you'll find a 65 page thread here on the issue, and there have been MANY other such posts in large forums such as Tom's Hardware and Linus Tech Tips, as well as in many Amazon comments for the product. I described a temporary fix in my post that involves disabling sleep and configuring Windows to hibernate instead:
Because I need to be able to access computer remotely, turning off the PC when not in use is not an option for me. I also don't want to leave the PC running all the time. My solution was to disable sleep entirely and have the computer Hibernate instead after 60 minutes idle, and activate by WOL. So far the only downside is a slightly longer recovery on wake (15-20 seconds instead of 1-2). Here's exactly what I did:
In Control Panel->Hardware and Sounds->Power Options:
1) Select Balanced plan settings
2) Select "Change plan setting" and set "Put the computer to sleep" to "Never"
3) Select "Change advanced power settings" and under "Sleep" set "Hibernate after": to 60 minutes (or your desired sleep time)
4) Apply, go back to "Power Options," select "Choose what the power button does," and set "When I press the power button" to "Hibernate"
5) Under "Shutdown settings" check "Hibernate" box and uncheck "Sleep" box
In BIOS, I reset to defaults, re-enabled DOCP, and set up APM as follows:
* ErP Ready: Disabled
* Restore AC Power Loss: Last State
* Power On By PCI-E: Enabled
* Power On By RTC: Disabled
So far all is working perfectly -- even my Veeam backup software is waking the computer for nightly backups.
Maybe that will help. Seems to be a design flaw in the VIII Hero and Dark Hero.
