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is 1.40A safe to draw from a PWM fan header?

post #1 of 9
Thread Starter 
i found an old DELL XPS 410 120MMx38MM fan and its extremely powerful (5K RPM) and it sucks alot of power 1.40A is that safe to plug into my motherboard? forgot to mention i have 2 other fans on the other 2 headers my cpu fan pulls .90A and the 140 barely takes .20
Edited by philhalo66 - 5/19/11 at 5:55am
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post #2 of 9
Most boards allow 1A, but it can vary from a motherboard to another. You could either contact your motherboard vendor to ask the question or simply hardwire the fan on a PATA MOLEX connector which has a much higher threshold.
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by dragosmp View Post
Most boards allow 1A, but it can vary from a motherboard to another. You could either contact your motherboard vendor to ask the question or simply hardwire the fan on a PATA MOLEX connector which has a much higher threshold.
1A for all fans combined? or per fan? ecs take months to reply so not even gonna bother? whats the worse that could happen if i leave it plugged in? and if i plug it into a MOLEX connector it will sound like a jet engine not joking its extremely loud.
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post #4 of 9
I would power it from a molex, but run the PWM and RPM sense to the motherboard header via a splitter.

Quote:
Originally Posted by philhalo66 View Post
1A for all fans combined? or per fan? ecs take months to reply so not even gonna bother? whats the worse that could happen if i leave it plugged in? and if i plug it into a MOLEX connector it will sound like a jet engine not joking its extremely loud.
It could kill the fan header.
    
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by RonindeBeatrice View Post
I would power it from a molex, but run the PWM and RPM sense to the motherboard header via a splitter.



It could kill the fan header.
how do i do that?


it wont kill my motherboard will it?
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post #6 of 9
Fan start-up amperage may be 1.40A x 3.
i blew up a mobo fan header, rated @ 2A, using 2 x san aces(2 x 0.56A)
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by IOSEFINI View Post
Fan start-up amperage may be 1.40A x 3.
i blew up a mobo fan header, rated @ 2A, using 2 x san aces(2 x 0.56A)
well here is the fan


TA450DC

b35502
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post #8 of 9
Quote:
Originally Posted by philhalo66 View Post
well here is the fan


TA450DC

b35502
this may help you.

http://www.overclock.net/air-cooling...nidec-fan.html
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by IOSEFINI View Post
wow great find thanks. +1

Quote:
Originally Posted by RonindeBeatrice View Post
I would power it from a molex, but run the PWM and RPM sense to the motherboard header via a splitter.



It could kill the fan header.

i rewired the fan to pull the power off the PSU and plug the PWM and sensor into the MoBo brilliant idea +100000000000
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