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Thread: CPU/System fan fail to run coming out of sleep.




  1. #11
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    Default Re: CPU/System fan fail to run coming out of sleep.

    Quote Originally Posted by parsec View Post
    In reality, "fastboot", which I assume is the BIOS option, actually shortens POST by skipping some functions. I've noticed fans not being detected by monitoring programs when Fast Boot settings are used. You also are seeing fan operation side affects from Fast Boot settings.

    The fix? Don't use "fastboot". I'm serious.
    parsec, did you have the same problems described here, and resolved it by disabling fast or ultra fast boot?

  2. #12
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    Default Re: CPU/System fan fail to run coming out of sleep.

    Quote Originally Posted by pwrUSR1900 View Post
    parsec, did you have the same problems described here, and resolved it by disabling fast or ultra fast boot?
    Alright, I've brought my system out of Windows 8 hybrid sleep now about 4-5 times and the fans are working properly each time after disabling fast boot.

    I've got the water pump plugged into cpu_opt running full speed.

    Still doesn't matter what settings I make in the BIOS for fan control though. But the system seems to be working properly now, finally.

  3. #13
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    Default Re: CPU/System fan fail to run coming out of sleep.

    Quote Originally Posted by parsec View Post
    In reality, "fastboot", which I assume is the BIOS option, actually shortens POST by skipping some functions. I've noticed fans not being detected by monitoring programs when Fast Boot settings are used. You also are seeing fan operation side affects from Fast Boot settings.

    The fix? Don't use "fastboot". I'm serious.

    I owe you big time man! I've already posted that this resolved the issue but I need to give you a proper thanks. My system is running like a freakin top now. I love it. Really happy with this board.

    In reality, if you are using UEFI BIOS and you enable fast boot in Windows 8, "Ultra Fast" or "Fast" boot in the Gigabyte BIOS doesn't make a bit of difference. Even if it worked 100% I don't see a reason to enable it.

  4. #14
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    Default Re: CPU/System fan fail to run coming out of sleep.

    Quote Originally Posted by pwrUSR1900 View Post
    I owe you big time man! I've already posted that this resolved the issue but I need to give you a proper thanks. My system is running like a freakin top now. I love it. Really happy with this board.

    In reality, if you are using UEFI BIOS and you enable fast boot in Windows 8, "Ultra Fast" or "Fast" boot in the Gigabyte BIOS doesn't make a bit of difference. Even if it worked 100% I don't see a reason to enable it.
    Wow, thanks, almost forgot about this thread.

    Sorry I never answered your question about disabling Fast Boot fixing an issue like this.

    When I first began using the Ultra Fast setting (on an ASRock board) I noticed that a fan speed reading in HWiNFO would disappear. In my situation, I could swear the fan was still running, and I was just missing the sensor reading. I need to check that...

    But yes, not using Ultra Fast consistently kept the fan speed reading displayed. Or really, using Ultra Fast causes the fan speed reading to be lost for some reason.

    In your case with the Gigabyte board and the SIV software you are using (correct?), you have more problems. I was using just the UEFI/BIOS fan speed control, and not the board's additional software for fan speed control. Actually, the board's software for fan speed control was not set to auto-run when Windows (8) boots, and I think yours was, right? If so, that might explain your issue.

    My theory, and it's just a theory, but follow me on this. Say you also had a fan sensor problem when using Fast Boot like I did, no RPM/speed reading from one or more of the fans, which I really assume is related to the board's sensor chip. The SIV software starts running when Windows boots and checks for fans by looking for non-zero fan speed readings. My theory would have no fan or pump speed data (so it is zero RPM) for one or more fans, and the SIV software decides no fan or pump on that header, and apparently turns it off.

    The detailed analysis of mine may be wrong, but the end result (fan or pump not running) we know happens.

    Since the Fast or Ultra Fast settings apparently cause certain things usually run during POST to be skipped, like the full initialization of the board's sensor chip, there may not be a simple fix for this problem. And yes, disabling Fast Boot is a work around.

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