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pwm fan splitter

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  • Battery
  • Fan
  • Motherboards
  • Components
Last response: in Components
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January 13, 2014 1:09:06 AM

im gonna explain it quickly because my battery is gonna run of. if i use a pwm fan splitter with molex but use non pwm fans in it, can my motherboard(maximus vi gene) control them as cpu fans and change the rpm of them

More about : pwm fan splitter

a b V Motherboard
January 13, 2014 1:15:42 AM

No. Non pwm fans that are controlled by the motherboard are controlled by voltage. As you will be using a pwm fan splitter with molex, the fan splitter will provide the full 12v to the fans running them at full speed. It will also try to send along the pwm signal telling them to slow down but this will of course fail, as they aren't pwm fans, and they will continue to run at full speed. If you post exactly what you have and what you are trying to do, we can more than likely tell you how to do it.
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January 13, 2014 10:50:36 AM

If i have like 6 corsair sp120s how would I control them automaticly through cpu heat? Is it even possible?
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January 13, 2014 11:12:23 AM

you would most likely need something a like a digital fan controller thats has temp sensors
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a b V Motherboard
January 13, 2014 2:43:51 PM

kale007 said:
If i have like 6 corsair sp120s how would I control them automaticly through cpu heat? Is it even possible?


Well you didn't say exactly what you have, but you can most likely control them all directly by fan headers. Those fans draw something like 2.5 watts, so you should be able to put two on each case fan header. Most decent motherboards have 3 case fan headers (at least) so you should be all set. Purchase 3 fan splitters (3 or 4 pin, doesn't matter which but make sure they do NOT supply power directly from the PSU) and you should be fine.
The other option of course is a fan controller but then you would be controlling them manually.
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January 13, 2014 11:04:18 PM

So i can throw 2 fans each plug? Or can i throw more
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a b V Motherboard
January 13, 2014 11:29:00 PM

Well you can put as many as you want on one fan header but remember they are drawing their current from the motherboard. Draw too much current, and you will burn out the fan header. Two is safe for sure. You can probably do more but you will want to look up whatever motherboard you have, see what the fan headers are rated for. Typically, it is something around 10-12 watts, or around one amp. Then see what your fans are rated for, and do the math. You can convert amps to watts using the formula amps*voltage=watts.
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January 14, 2014 2:16:19 AM

Ok. Thanks alot. Im gonna use this information on my next build on 750d with custom water cooling. Thats why i need so many fans.
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