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  1. #1
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    Gentle Typhoon AP-15 fans not going at full speed - maximus vi hero/H100i

    Hi all

    Got a weird issue that I'm hoping someone could help with. I'm using a Corsair H100i and changed the (horrible) stock fans for 2 x Scythe GT AP-15s.

    The problem is the fans should go up to 1850 RPM max but they seem to max out at just 1700 rpm. I'm currently using AI Suite III to control fans, with a profile I set up. I can see the fans going to 100% on there, but AI Suite and HWMonitor both show 1700rpm only at that point.

    The fans aren't PWM as opposed to the ones that came with the H100i, but I thought all the Z87 motherboards could fully control non-PWM fans now. Indeed it can change the speed, just doesn't seem to go to the full max rpm.

    I expected the temps to go up slightly with these fans as they're not rated as high as the corsair ones, but I was happy to sacrifice a bit of performance for the sake of my ears. But now my temps have gone up about 5 degrees on IBT which is more than I wanted really.

    Could it be a voltage thing - i.e. the mobo isn't giving the fans enough power for some reason? Or could it just be the monitoring that's the issue? Given the temp increase it does look to me like they're not spinning at their full speed.

    Cheers

    Mike
    CPU: i7-4770k @ 4.4GHz 1.22v
    MOBO: Asus Maximus VI Hero
    RAM: 16Gb Corsair Vengeance @ 2000MHz
    COOLER: Corsair H100i
    CASE: Coolermaster CM690 II Advanced
    GRAPHICS: Gigabyte Windforce 3X GTX670 SLI
    PSU: 850W XFX Pro Black Edition

  2. #2
    untouched Array Praz's Avatar
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    All my AR-15 fans report about the same speed and I have them connected to 4 pin Molex connectors at the power supply.

  3. #3
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    Maybe that's just the way it is then. Seem odd as I've seen benchmarks like the one below where they're tested at various speeds up to 1850, but to be honest I'm happy with how quiet they are so guess I'll just not stress about it.

    Click image for larger version. 

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ID:	24214
    CPU: i7-4770k @ 4.4GHz 1.22v
    MOBO: Asus Maximus VI Hero
    RAM: 16Gb Corsair Vengeance @ 2000MHz
    COOLER: Corsair H100i
    CASE: Coolermaster CM690 II Advanced
    GRAPHICS: Gigabyte Windforce 3X GTX670 SLI
    PSU: 850W XFX Pro Black Edition

  4. #4
    untouched Array Praz's Avatar
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    The difference may be due to how the RPM signal from the fan is being interpreted.

  5. #5
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    Maybe so, in which case the temp difference between the fans is bigger than expected. Oh well no worries. Thanks for your help dude!
    CPU: i7-4770k @ 4.4GHz 1.22v
    MOBO: Asus Maximus VI Hero
    RAM: 16Gb Corsair Vengeance @ 2000MHz
    COOLER: Corsair H100i
    CASE: Coolermaster CM690 II Advanced
    GRAPHICS: Gigabyte Windforce 3X GTX670 SLI
    PSU: 850W XFX Pro Black Edition

  6. #6
    untouched Array Praz's Avatar
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    You're welcome.

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