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[SOLVED] Can PWM Y-Cables be daisy-chained?

post #1 of 27
Thread Starter 
Might seem like a silly premise, but I'd like to have three fans running off of one header. I have a Hyper 212 Plus, which will take two fans, and it's pointed directly at a 120mm exhaust case fan.

This is the cable I would be using: http://www.newegg.com/Product/Product.aspx?Item=N82E16812718001

I assume that there would be at least a slight voltage drop when doing this, so the fans might spin slower (or something), but I'm wondering if it's even doable. I would guess it isn't advised, but I'm no electrical engineer so I hope I'm wrong. I'm thinking it might be fine as long as I make sure that the 4-pin connector is leading into the next cable.

Also, out of curiosity - could you do this with more than two Y-cables?
post #2 of 27
http://www.amazon.com/Phobya-3-Way-Splitter-Single-Connection/dp/B004CLFOK4/ref=sr_1_1?ie=UTF8&qid=1389226873&sr=8-1&keywords=3+way+fan+splitter
 
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Hackintosh
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post #3 of 27
Thread Starter 
Well I guess that solves my problem. Didn't think odd-numbered splitters would exist. Thanks!
post #4 of 27
yes they are daisy chain-able, just make sure you are chaining the power and pwm pins only while the rpm pin is only linked to 1 fan.

3 fans off 1 header is fine with negligible voltage drops, i've done 4 fans off a single header but i'd keep the max at 5.

arctic cooling fans are designed specifically to allow for pwm chaining and their max recommendation is 5, if you want more then 5 fans i'd recommend to wire the fans to the PSU molex and just hook up the pwm and rpm signal from the mobo
post #5 of 27
I think it would be fine to daisy chain them. Just don't duplicate the RPM wire.
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post #6 of 27
You would be better off using a PWM splitter with PSU power like this
http://www.moddiy.com/products/PWN-1%252dTo%252d4-Fan-Splitter-Cable-%28Sleeved%29-.html

And you can daisy chain two together but don't try and run more than 8-9 total fans or PWM may not work. Signal may be too weak to trip the fan PCBs.
post #7 of 27
Thread Starter 
Yeah, I was only going to do three. I think it's best to just buy the right tool for the job instead of chaining them. Glad to know that it's okay to do, though.
post #8 of 27
You don't want to put more than 1A on a motherboard fan header.. and there are some fans that use more than that. not many. Still better to use PSU instead of motherboard for power and just the PWM from motherboard.
post #9 of 27
Thread Starter 
Quote:
Originally Posted by doyll View Post

You don't want to put more than 1A on a motherboard fan header.. and there are some fans that use more than that. not many. Still better to use PSU instead of motherboard for power and just the PWM from motherboard.

Unless you want fan control...
post #10 of 27
Quote:
Originally Posted by wampastompa View Post

Quote:
Originally Posted by doyll View Post

You don't want to put more than 1A on a motherboard fan header.. and there are some fans that use more than that. not many. Still better to use PSU instead of motherboard for power and just the PWM from motherboard.

Unless you want fan control...
Obviously you have no idea what PWM is and how it works. Have fun. thumb.gif
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Overclock.net › Forums › Cooling › Air Cooling › [SOLVED] Can PWM Y-Cables be daisy-chained?