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fan header

flearider
Level 8
whats the max amp you can pull off the fan header's .. ? I'd like to put 3x 120's on one there 12v and pull 0.37amp ..

and are all the headers the same amp value ? could I put 3 more on another 2 headers ?
thx flea
AMD FX 8350 5.1ghz 221x23
CROSSHAIR V bios 1703
g-skill sniper 1600@1800
What does it matter now if men believe or no?
What is to come will come. And soon you too will stand aside,
To murmur in pity that my words were true
(Cassandra, in Agamemnon by Aeschylus)

to see the wizard one must look behind the curtain ...
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8 REPLIES 8

Retired
Not applicable
dont exceed 1 amp on each header..

flearider
Level 8
hmm anyone know if that's in the spec sheet ..
if it is 1amp going to leave it ..
AMD FX 8350 5.1ghz 221x23
CROSSHAIR V bios 1703
g-skill sniper 1600@1800
What does it matter now if men believe or no?
What is to come will come. And soon you too will stand aside,
To murmur in pity that my words were true
(Cassandra, in Agamemnon by Aeschylus)

to see the wizard one must look behind the curtain ...

Retired
Not applicable
its the general forum rule..
if its in the manual, i dunno about..

I know the spec, but keep the 1 amp.. thats my advice

flearider
Level 8
thx whitepaw .. but not on about the manual i'll try and find the tech specs .. I was hoping for 1.5 ish ..
thx again ..
AMD FX 8350 5.1ghz 221x23
CROSSHAIR V bios 1703
g-skill sniper 1600@1800
What does it matter now if men believe or no?
What is to come will come. And soon you too will stand aside,
To murmur in pity that my words were true
(Cassandra, in Agamemnon by Aeschylus)

to see the wizard one must look behind the curtain ...

Retired
Not applicable
if you are using PWM fans, take the PWM and RPM signal from the header, and the power from the PSU.. In that way you can run more fans with PWN control

there are terminals, and cable splitter on the market for this

flearider
Level 8
running them on 3 diff headers atm cpu ,opt1 and chass 3 in dc mode there only 3 pin .. I'm just going to have to save more cash and get another fan controller .. had to split these off after replacing my fans the other day .. fan controller could not take 2x140 2 pumps and 10x120 fans .. so was going to run the 2 triple rad fans off the board and leave the quad on the controller ..
ok thx for your help ..
AMD FX 8350 5.1ghz 221x23
CROSSHAIR V bios 1703
g-skill sniper 1600@1800
What does it matter now if men believe or no?
What is to come will come. And soon you too will stand aside,
To murmur in pity that my words were true
(Cassandra, in Agamemnon by Aeschylus)

to see the wizard one must look behind the curtain ...

TheNerdBench
Level 10
Food for thought....the fan controller IC may not be the limiting factor here...

It appears that much to my surprise that the maximum current that you can run from a 22 AWG wire is .92 amps and I'm pretty sure that the wire used for fans is closer to 24 to 26 AWG which is .577 amps and .361 amps.

See link for more info:
http://www.cablesandconnectors.com/wiregauge.html

Add the traces on the motherboard have a lot less copper than a 26 AWG wire so tread carefully here 🙂

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MB: Crosshair V Formula-Z • CPU: FX-8350 • GPU: Asus Matrix R9 280x • RAM: 8GB of Crucial Ballistix Tactical Tracer (1866)• PSU: Thermaltake DPS Thoughpower 750 Watt • CPU Cooler: Thermaltake Frio Advanced • Keyboard: TT Sports Challanger Ultimate • Mouse: TT Sports Black Element • Case: Thermaltake GT Level 10


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Retired
Not applicable
and different fans have different startup voltages, some fans draw more juice than others if ramped up very fast 0-100%, thats why its wise to keep the 1 amp rule i think..

NERD, Yes, seemingly thin wires can handle quite amount of power.