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post #11 of 21
Quote:
Originally Posted by linuxjedi View Post

Thanks for the answer!

I've been looking at this controller, but I need to control 7 or 8 fans instead of just 6. I'm not sure how to split the channels to make it possible. It is mentioned that this is possible in the product reviews.

link => http://m.newegg.com/Product/index?itemnumber=11-992-012

Anyone know how to split?

Hmmm ... Interesting. So what we need is some device to devide one into two ... To split a channel into two outputs .. Some kind of, I dunno, splitter? If you will.

http://m.newegg.com/ProductList?keyword=Fan+splitter

Generally it's easiest to have all the fans on a rad on a single channel so you aren't fiddling with multiple controls just to speed up one rad. On the same manor I find it easiest to have all exhaust or other function fans on a single channel too.
With that sort of standard 3 pin fan controller you want simple 3 pin to 3 pin splitters ... Eg.
http://m.newegg.com/Product/index?itemnumber=12-493-016
Edited by Jakusonfire - 11/3/15 at 10:48pm
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post #12 of 21
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

Hmmm ... Interesting. So what we need is some device to devide one into two ... To split a channel into two outputs .. Some kind of, I dunno, splitter? If you will.

http://m.newegg.com/ProductList?keyword=Fan+splitter

Generally it's easiest to have all the fans on a rad on a single channel so you aren't fiddling with multiple controls just to speed up one rad. On the same manor I find it easiest to have all exhaust or other function fans on a single channel too.
With that sort of standard 3 pin fan controller you want simple 3 pin to 3 pin splitters ... Eg.
http://m.newegg.com/Product/index?itemnumber=12-493-016
Niiiiiice!

Do you lose power to the individual fans by splitting? I read in another thread that it reduces available power. I am not an electrician, or a physicist, so forgive me...
post #13 of 21
A couple of things...first off, the fan controller you linked isn't PWM. It is a regular fan controller with 4 pin connectors. If you are using EK fans with your predators, they won't work very well. As for the ratio of intake to exhaust, it really doesn't make much difference. I've got dual 240s set with 4-120 intake fans and 1 120 exhaust. My temps are excellent. There really isn't any ratio of intake to exhaust. While it is true that every case is different, a single fan can exhaust most cases quite efficiently.

As for splitting fans...there is no issue there. As an example, the Sentry Mix 2 is rated for 30W per channel to a total max of 180W. A Noiseblocker eLoop B12-3 uses 2.05W. You could put 14 of them on splitters to one channel alone. On the PWM side, make sure that only 1 fan per channel is sending the PWM signal or else you will get mixed RPM signals. EK makes splitters specifically designed for this.

In my personal system, I'm using an AQ6 XT with each rad on a separate fan channel and the exhaust on it's own.

Hope this helps. thumb.gif
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post #14 of 21
Quote:
Originally Posted by linuxjedi View Post

Niiiiiice!

Do you lose power to the individual fans by splitting? I read in another thread that it reduces available power. I am not an electrician, or a physicist, so forgive me...

No, not that you would notice. There is always some voltage drop but it's like half a volt.


The predators can be controlled by the MB as long as you have two pwm headers, so that just leaves the case fans. It may be a good idea to put the front intake fans on one channel and the top 4 on another, with maybe the 140 single fan by itself. Controllers like the one you linked are quick and easy to use with those simple slide controls so it won't be too fiddly.
So maybe grab a triple and quad splitter. That will let you adjust the airflow and noise really well.
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post #15 of 21
Thread Starter 
Quote:
Originally Posted by Radnad View Post

remember, since your water cooling now very little if any heat goes into the case from the cpu and gpu's, the heat is getting transferred to the coolant. so the little bit of heat getting pushed back into the case from the rads is generally still less than the heat that air cooled components would have generated. for general case fans i would go with the AF instead of the SP if you want corsair fans, put them on a fan controller and run them low as possible. but there are other better case fans out there as well, just have to do the research, or maybe others will chime in with their favs.
Very interesting. I'm definitely going to try it out. This alleviates some concern about the pressure, to be sure.

Appreciate the advice on AF vs SP fans. I've had two folks tell me so far that AF is better for general purpose, and SP for rads. Interestingly I've read elsewhere on this forum from folks with pretty high rep that you should use SP fans on _everything_. I wonder why?

As for fan branding, I haven't settled on a given brand. I'd like to get some nice fans, but they don't need to be extremely nice. It looks like I'll have more than enough air flow if I point all fans inward with the exception of the single exhaust fan, which I suppose should be OK because the back of the 900D case is chock full of holes. I have even considered a custom plate to close them all off. However now that I'm looking at nearly all fans blasting inward, I don't see a pressure problem causing dust accumulation through the holes. Instead, I think I'll be cleaning the filters more often tongue.gif
post #16 of 21
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

No, not that you would notice. There is always some voltage drop but it's like half a volt.

The predators can be controlled by the MB as long as you have two pwm headers, so that just leaves the case fans. It may be a good idea to put the front intake fans on one channel and the top 4 on another, with maybe the 140 single fan by itself. Controllers like the one you linked are quick and easy to use with those simple slide controls so it won't be too fiddly.
So maybe grab a triple and quad splitter. That will let you adjust the airflow and noise really well.
I'm going to control each predator with a PWM head from the motherboard, I think. That's my plan so far. The rest of the fans I just either need some sort of splitting as has been suggested and explained already. I'm currently going over the various approaches that have been suggested. I think your suggestions are right in line with my cooling goals.
post #17 of 21
Thread Starter 
Quote:
Originally Posted by longroadtrip View Post

A couple of things...first off, the fan controller you linked isn't PWM. It is a regular fan controller with 4 pin connectors. If you are using EK fans with your predators, they won't work very well. As for the ratio of intake to exhaust, it really doesn't make much difference. I've got dual 240s set with 4-120 intake fans and 1 120 exhaust. My temps are excellent. There really isn't any ratio of intake to exhaust. While it is true that every case is different, a single fan can exhaust most cases quite efficiently.

As for splitting fans...there is no issue there. As an example, the Sentry Mix 2 is rated for 30W per channel to a total max of 180W. A Noiseblocker eLoop B12-3 uses 2.05W. You could put 14 of them on splitters to one channel alone. On the PWM side, make sure that only 1 fan per channel is sending the PWM signal or else you will get mixed RPM signals. EK makes splitters specifically designed for this.

In my personal system, I'm using an AQ6 XT with each rad on a separate fan channel and the exhaust on it's own.

Hope this helps. thumb.gif
Thanks for taking the time to write that up.

I'm going to do the EK predator fans right off the mobo, and I'll run the other fans off the non-PWM controller.

Sounds like fan wattage won't be a problem with 30W per channel! I'll stop worrying about that biggrin.gif

You make a good point about only 1 fan sending back a PWM signal. I'm going to count on the fact that the PWM-enabled predator will do the right thing, in that regard, when connected to the mobo properly.

Still looking into SP vs AF fans for the case tho... Not completely sure what is the right decision yet and why.
post #18 of 21
You'll be fine with the predator fans that way. As for the AF vs. SP fans, it really won't make a difference either way. Personally, I would select whichever is quieter for my build. thumb.gif
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post #19 of 21
Thread Starter 
Quote:
Originally Posted by longroadtrip View Post

You'll be fine with the predator fans that way. As for the AF vs. SP fans, it really won't make a difference either way. Personally, I would select whichever is quieter for my build. thumb.gif
I did some research and went with the fans below-- order placed. This is the last part of the order for my new build. Soon, a build log will begin!

1 count - NZXT SEN-MIX2 Sentry Mix 2 Fan Controller
Item #: N82E16811992012

7 count - COUGAR 12CM CFD Red LED Hydraulic (Liquid) Bearing Ultra Silent Fan 1200RPM, 64.4CFM, 16.6dBA
Item #: N82E16835553010

4 count - Coboc TX4SPL2-12 12" Sleeved 12 inch 1 to Two(2) x 4-pin TX4 PWM Fan Power Splitter Cable(Net Jacket)
Item #: N82E16812423161
post #20 of 21
Those that think having a radiator on one of your intakes is a bad thing, watch this video
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