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Wanting to understand PWM fan - Page 2

post #11 of 14
Thread Starter 
Quote:
Originally Posted by psyclum View Post

unfortunately, if the mobo does that at boot up, then there is nothing you can do. it's a safety feature during post for the mobo to see if the attached fans are working. it spins to max because alot of the industrial strength fans requires a high starting voltage to get it spinning. once it's spinning, it can be lowered down to quieter speeds. but to get the fan going in the 1st place, it's typically good to give it a full power.

if it really bothers you that much. then you may want to look into an independent fan controller if you have a spare 5.25 bay.

Ah thank you, I guess there's people modding their own bios, but I ain't sure if I feel confident about doing that.
Do you know any mobo that doesn't do this?
post #12 of 14
unfortunately most of the higher end mobos will support that feature... some of the lower end mobos don't but i don't play with enough mobo's to be able to tell you which one does and which one doesn't frown.gif sorry
post #13 of 14
Thread Starter 
Quote:
Originally Posted by psyclum View Post

unfortunately most of the higher end mobos will support that feature... some of the lower end mobos don't but i don't play with enough mobo's to be able to tell you which one does and which one doesn't frown.gif sorry

no worries, I appreciate the concern.
I guess after all if i am gonna ditch my fan controller, I will still end up with using low rpm fan and reducing wire on pump.
post #14 of 14
Quote:
Originally Posted by GhostHitWall View Post

wow okay so this is basically stepping up my question to How PWM controller works and in comparison.
Ah okay, I was just wondering why pwm fans are advertised the way they are and how practical it could be implemented.
Thank you.
Good explanation.


This is a little bit off topic, if needed to open a new thread pls let me know.
Is there anyway to prevent a mobo to spin all attached fan to max speed at startup/wakeup except using a voltage hindering wire adapter or fan controller??
I suppose this is a safety check for the fan working properly or at all.
All motherboard I have on my hands do the same.
What psyclum said.

It's your thread, take it wherever you what. You can even edit the title if you want. biggrin.gif

Aqua Computer makes probably the best fan controller available, but they are not cheap.
Aquaero 5 has 1 PWM control plus voltage control
Aquaero 5 LT mounts inside of case .. does not use a 5.25 bay
Aquaero 6 has 4 separate PWM controls plus voltge control

All Aquaero 5 are basically same system with LT and a few accessories being able to do all the things the more expensive models can using screen / mouse / keyboard. Honestly, the Aquareo 6 is basically same as 5 with more PWM lines. All fitting in 5.25 bays are really too complicated to use with only the 5.25 face panel.
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