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Fan wattage booster?

post #1 of 11
Thread Starter 
I am looking for something that I don't know exists or even can be done.

I like using the software that came with my Thermaltake Water 2.0 Extreme but the fan controller on it only supports 1.0 A total on the fan controller. (total assumption based on each of the fans that came with it are 0.5 A each)

I want to use four fans on it and the total of those four fans comes to 1.4A. I don't know the Wattage of the fans and I have no idea if I will burn out the controller or what.

Now if i can power four fans (with splitters) off this built in controller I won't have to find this crazy thing I am looking for.

Now onto my curious object.

Is there such a device that reads the voltage input from a source (in this case a fan header) and takes it and boosts the amperage or wattage or whatever it is (not an engineering major) to the fans as to not burn out the controller?
post #2 of 11
put 2 fans on the controller that comes with it then put 2 fans on the mobo header and control it via software/bios
post #3 of 11
Thread Starter 
Quote:
Originally Posted by psyclum View Post

put 2 fans on the controller that comes with it then put 2 fans on the mobo header and control it via software/bios

The fan headers on my mobo seem to have burnt out when I changed cases so that really isn't an option, I just want something to use the existing software so the fans are all going the same speed.
post #4 of 11
what are the 2 additional fans you are adding to the unit? are they loud? if not, you can simply put 2 fans straight onto the PSU and have the controller deal with the other 2 fans. this way you have 2 fans doing constant cooling the controller will ramp up the other 2 fans when needed.
post #5 of 11
Quote:
Originally Posted by h0thead132 View Post

I want to use four fans on it and the total of those four fans comes to 1.4A. I don't know the Wattage of the fans and I have no idea if I will burn out the controller or what.

If you know the amperage of 12v fans, you know the wattage. (1.4 * 12 = 16.8 / 4 = 4.2w per fan)

Not that wattage matters in this case.
Quote:
Originally Posted by h0thead132 View Post

Now if i can power four fans (with splitters) off this built in controller I won't have to find this crazy thing I am looking for.

The limit is more likely to be the fan header on the motherboard than the Water 2.0 Extreme controller.

What sort of current does the pump use, and what are you motherboard's fan headers rated for?
Quote:
Originally Posted by h0thead132 View Post

Now onto my curious object.

Is there such a device that reads the voltage input from a source (in this case a fan header) and takes it and boosts the amperage or wattage or whatever it is (not an engineering major) to the fans as to not burn out the controller?

If you can splice two motherboard fan headers into the single power connector for the pump/controller, or simply use a 4-pin molex to 3-pin adapter for it (preferably one with a separate yellow wire for RPM sense), you will have much more current available, and it's highly unlikely (though not impossible) that an extra 400mA will damage the controller itself.
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post #6 of 11
Thread Starter 
Quote:
Originally Posted by psyclum View Post

what are the 2 additional fans you are adding to the unit? are they loud? if not, you can simply put 2 fans straight onto the PSU and have the controller deal with the other 2 fans. this way you have 2 fans doing constant cooling the controller will ramp up the other 2 fans when needed.

I am using two CM Blademasters right now and was going to get two more. At full power they are decently loud but with the auto power control that is built into the pump and the accompanying software makes them nice and quiet when not needed.
Quote:
Originally Posted by Blameless View Post

If you know the amperage of 12v fans, you know the wattage. (1.4 * 12 = 16.8 / 4 = 4.2w per fan)

Not that wattage matters in this case.

well that may be total then, each fan is .35A.
Quote:
Originally Posted by psyclum View Post

What sort of current does the pump use, and what are you motherboard's fan headers rated for?

I have no idea what the pump uses and like I said in an earlier post my mobo fan headers are burnt out / not working so I have it plugged directly into the psu.
Quote:
Originally Posted by Blameless View Post

If you can splice two motherboard fan headers into the single power connector for the pump/controller, or simply use a 4-pin molex to 3-pin adapter for it (preferably one with a separate yellow wire for RPM sense), you will have much more current available, and it's highly unlikely (though not impossible) that an extra 400mA will damage the controller itself.

But won't doing this essentially just bypass the fan controller and give it the full 12v all the time?
Edited by h0thead132 - 3/21/13 at 9:36pm
post #7 of 11
Without having seen the product before, it's difficult to figure out exactly is plugged in where for this setup. Looks like the Thermaltake system is just getting power from a mobo header, or I guess you have it plugged into the PSU?

So all four fans would be PWM fans that you want to control with the same PWM signal? Or does the Thermaltake run the fans at different speeds (though why? I guess not)?

Seems to me like there shouldn't be any limit from any kind of controller of Thermaltake's. The power is coming from the mobo header (now PSU), from the +12V and GND lines. The controller is just responsible for generating the PWM signal that controls the speed the fans and pump run at. Or for whatever reason there are some electronics on Thermaltake's part that are driving the fans and somehow have a limit of about 1A (why? you already have power) If there's some power limitation in some docs, it's probably just not wanting you to burn out your mobo's fan header. Just plug everything in and it should be okay.


In case I completely misunderstood how this is wired, in general, if you need to distribute a PWM signal to multiple fans and don't want to burn out a header, you use this splitter thingy that takes power via molex from the PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16812119248
Edited by mikeaj - 3/22/13 at 12:57am
post #8 of 11
What mikeaj said. Use a PWM splitter with molex power.

Best PWM splitter I know of is the new Swiftech 8 way PWM splitter
http://www.swiftech.com/8-waypwmsplitter.aspx
post #9 of 11
Thread Starter 
Quote:
Originally Posted by mikeaj View Post

Without having seen the product before, it's difficult to figure out exactly is plugged in where for this setup. Looks like the Thermaltake system is just getting power from a mobo header, or I guess you have it plugged into the PSU?

So all four fans would be PWM fans that you want to control with the same PWM signal? Or does the Thermaltake run the fans at different speeds (though why? I guess not)?

Seems to me like there shouldn't be any limit from any kind of controller of Thermaltake's. The power is coming from the mobo header (now PSU), from the +12V and GND lines. The controller is just responsible for generating the PWM signal that controls the speed the fans and pump run at. Or for whatever reason there are some electronics on Thermaltake's part that are driving the fans and somehow have a limit of about 1A (why? you already have power) If there's some power limitation in some docs, it's probably just not wanting you to burn out your mobo's fan header. Just plug everything in and it should be okay.


In case I completely misunderstood how this is wired, in general, if you need to distribute a PWM signal to multiple fans and don't want to burn out a header, you use this splitter thingy that takes power via molex from the PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16812119248

Quote:
Originally Posted by doyll View Post

What mikeaj said. Use a PWM splitter with molex power.

Best PWM splitter I know of is the new Swiftech 8 way PWM splitter
http://www.swiftech.com/8-waypwmsplitter.aspx

Ok so I am interpreting these two posts as I am worrying too much and my assumed limitations are non existent and four pin fans work way differently than three pin fans so all in all I should be fine...

I have no idea how the internals of this thing work but there is a three pin fan header (that I have plugged directly into the PSU) and an internal usb plug for the software at this point I just need to look up how four pin PWM fans work...

Thanks all, + REP
post #10 of 11
I assume you mean 4pin PWM not 4pin molex.

*PWM is Pulse Width Modulation
*The pins are neutral / 12v / rpm / PWM
*4pin PWM fans run on 12v always.
*There is a circuit board in the fan that receives the PWM signal and sents pulses of 12v power to the fan. This PWM signal comes from the motherboard and can run several fans.
*The rpm signal from fan is monitored by motherboard. Motherboard knows what the fan speed is and what the CPU heat is and adjusts the PWM signal to increase or decrease the fan speed depending CPU temperature.
*The PWM splitters with molex power supply the fans with 12v from the PSU and supply the PWM signal from the motherboard so all fans plugged into the splitter run on the same PWM signal... so if all fans are same or similar in rpm range they all run similar speed.

If you are plugging 4pin PWM fans into 3pin fan headers/sockets they will function as 3pin voltage controlled fans. 3pins are neutral / power / rpm. Power is 5v-12v.
Edited by doyll - 3/22/13 at 9:52am
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