Dual PMW Fans on CPU Fan Header?

[-AUGieDogie-]

OK so I have a thermalright 120 heatsink, running in pushpull configuration right now. Just two 3 pin fans on it. What I want to do is to splice the wires of two PWM fans (4 pin arctic cooling comes to mind) so that I can run BOTH off of the CPU fan header. That way, both fans can ramp up and down as the cpu temp needs it.

My concern is.. I have no Idea what kind of amperage the header can handle. The fans are pretty low consumption, 0.13 amp each but since i have no idea about the max amperage the header can handle im kinda blind hear. I dont just wanna plug them in and risk burning out the header.

Any Ideas appreciated

[71 (Bryan)]

it should work, the header can handle about 0.85 amps give or take, but it will make no difference if you use a 3 pin or 4pin connector since the fan you are using doesnt support pwm (you can still use the header in 3 pin mode)

[-AUGieDogie-]

.85 amps is good. Even the worst one i've seen is .3 amps so even two of those would be only .6.
Just outa curiosity how do i find out how much a particular header, or for that matter ALL the headers can handle amperage wise?

[71 (Bryan)]

i think oyu can find that in your mobo's manual

[vengance_01]

All modern motherboard from the likes of Asus, gigabyte, DFI etc.. will handle two 120mm fans through a single plug unless they are the high output delta type fans.

[WoZZeR999]

I would say the most I would put through a header is 10W, maybe more if you are feeling lucky. 10W~ .833 amps @ 12v.

[-AUGieDogie-]

Holy , it is in the manual!!!

2amp (24amp) @ 12v Im guessing that is for ALL of the headers but still its a pretty decent amount.

[demonkevy666]

wouldn't have bee4n easier to just buy a rosewill z5 ultra ?

maybe not 120mm fans but it's got two fans 92mm fans in push pull, they contra-rotate too.

little pricey though.

[71 (Bryan)]

Holy , it is in the manual!!!

2amp (24amp) @ 12v Im guessing that is for ALL of the headers but still its a pretty decent amount.

holy , thats alot, what board are you using?
and i was scared of frying my board at .85

btw that should mean each header should hold that and not just sharing 2 amps over all the ports since each header has its own mosfet (or mine does at least)

[WoZZeR999]

Holy , it is in the manual!!!

2amp (24amp) @ 12v Im guessing that is for ALL of the headers but still its a pretty decent amount.

I'm assuming you mean 2 amp, 24 WATT. Does your fan headers have small 3 pin chips near it? If they have voltage regulators, then it could be. That's probably also a max amperage, with a real mean somewhere lower than that.

[-AUGieDogie-]

I'm assuming you mean 2 amp, 24 WATT. Does your fan headers have small 3 pin chips near it? If they have voltage regulators, then it could be. That's probably also a max amperage, with a real mean somewhere lower than that.

Yes, that is what i meant.

What kind of 3 pin chips? like little mosfet chips?

And it is a Asus p5w-dh