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Fan Controller or fan plugs on MB

Discussion in 'General Hardware' started by jman20nnsss, Apr 21, 2012.

  1. jman20nnsss New Member

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    hi guys,i was wondering,should i get a six fan controller with 30W output for each fan or should i just stick to the fan plug on the motherboard cause im using an asus board and plug the fans into them because i heard from one of my friends that the fan plugs on motherboards dont give the full power for fans to blow at their full speed
  2. lilhasselhoffer

    lilhasselhoffer

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    Motherboards generally throttle fans to reduce noise.

    If you want 100% fans, then alter settings in the BIOS/UEFI. Otherwise, there is no difference between a fan controller and the on-board fan controller.
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  3. jman20nnsss New Member

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    well,asus has their fan Xpert program 2 so that should probably make the fans go full power right?
  4. lilhasselhoffer

    lilhasselhoffer

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    OK, we're obviously not on the same page here.

    Motherboards generally have either built in thermal sensors, or throttle fans to a given percentage of maximum speed constantly. The former option uses thermal readings, and an output curve to determine how fast fans spin. For example; 28C is 25% fans, 30C is 25%, 40C is 40%, 50C is 60%, 60C is 80%, 70C is 80%. This way, fan noise during non-intensive use can be minimized to decrease noise. The latter option throttles a fan speed to a percentage of maximum constantly, so there is a minimum of noise. The first option is more expensive, the second doesn't account for heating. They have their purposes.


    The BIOS/UEFI is how a motherboard's fan controls are accessed. If there are thermal curves you can set them (higher percentages or a more graduated spin-up), and if there is a constant percentage you can set that. Asus offers a program to do this from inside windows, but it is the same as direct access.


    So yes, you should be able to set the fans to run at 100% all of the time no matter how you control them. The only question is whether the motherboard socket will deliver sufficient power to more than a couple of fans, and that information is in the motherboard manual.
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  5. jman20nnsss New Member

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    Ohhhhhh kk thx!

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