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fan controller solution for large number fans?

post #1 of 21
Thread Starter 
I am looking for a fan controller solution for my setup. The case has 28x120mm fans. I have been looking at the zalman mfc1:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811999171

It is $40 and can do 6 fans. That is getting pretty expensive though. I am wondering if anyone had any ideas on what fan controllers I should get for that many fans? The most I commonly see is 6 fans per block. Thanks guys
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post #2 of 21
Most fan controllers have 6-channel control but each channel can control more than 1 fan. And, of course, there is a limit of number of fans per channel, depending on the watts supported on each channel.
For an example, Lamptron FC2 can control 6 channels with 45W max per channel.

Perhaps you can go through all 28 fans and try to put them into groups. With this, you might get away with just 2 fan controllers?
Edited by windfire - 5/6/11 at 10:42pm
post #3 of 21
Thread Starter 
What would be the limit with the "grouping" or combining of channels? How do you measure that? I keep hearing about the wattage per channel and stuff like that. I figure I would need to buy y-split cables if I did that. Thanks for any more info you have

edit: oops. I see you already mentioned the wattage stuff. I am researching right now.
Edited by jakefeb3 - 5/6/11 at 10:51pm
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post #4 of 21
i just found this 8 channel fan controller (30 watts max output per channel)
http://www.pccasegear.com/index.php?main_page=product_info&cPath=9_511&products_id=17214

yes i know its an australian website, but surely you can find it elsewhere.
you can probably run 3 or 4 fans on each channel with that controller.
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post #5 of 21
28 fans ...

Well, a watt=volts * amps. Each of your fans should tell you the amp "draw" required, it's listed on the fan hub label. Not knowing anything about what fans you have, I would guess you're gonna need minimum 40 watt (or more) per channel fan controller.

The Lamptron FC-2 - 45 Watts Per Channel 6 Channel Fan Controller is what I'd be looking at, but it all depends on your fans power requirements. And you'll need y-splitters as well.
post #6 of 21
Quote:
Originally Posted by jakefeb3;13413239 
What would be the limit with the "grouping" or combining of channels? How do you measure that? I keep hearing about the wattage per channel and stuff like that. I figure I would need to buy y-split cables if I did that. Thanks for any more info you have

edit: oops. I see you already mentioned the wattage stuff. I am researching right now.

Reference thread:http://www.overclock.net/other-hardware-mods/966170-daisy-chaining.html (read post #4)

Using Y-splitters means the fans are in parallel. You simply add up the wattage for each fan (found in its spec) and make sure this sum total does not exceed the max wattage for that channel.

Review of FC-2: http://www.overclock3d.net/reviews/cases_cooling/lamptron_fc-2_rheobus_fan_controller/1
Edited by windfire - 5/6/11 at 11:06pm
post #7 of 21
Thread Starter 
Very very helpful guys. The fans are gentle typhoon ap-14. I am trying to look up the wattage for them right now. Perhaps someone knows their wattage already?

edit: the fans say they are 12 voltage. .049 amps . So that is ~.65 watts in my calculation. Am I doing it wrong? That seems way low, since we are talking about 40 watts per channel and such
Edited by jakefeb3 - 5/6/11 at 11:17pm
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post #8 of 21
Quote:
Originally Posted by jakefeb3;13413436 
Very very helpful guys. The fans are gentle typhoon ap-14. I am trying to look up the wattage for them right now. Perhaps someone knows their wattage already?

Check the spreadsheet here. http://www.overclock.net/air-cooling/807428-official-scythe-gentletyphoon-club.html

Has all the info you will need to make the conversion. Your main concern will not be just how many fans you can put on there per channel - but more specifically how much start up wattage will it take to add X number of fans to one channel. (start up wattage to get the fans spinning is usually slightly higher than the running wattage for most fans).
    
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post #9 of 21
Thread Starter 
If I used these values:
volts: 13.2
amps: .22
I count the watts to be ~3 watts per fan.
So if I understand correctly, that means I could put 10 fans safely on each controller channel (or more). Am I understanding this correctly?
I would realistically consider grouping them into 2, 3, or 4 fans per channel. I checked newegg and they want $7 for each y-split. I guess I will look around for some cheaper y-splits
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post #10 of 21
AP14's is ~0.6w @ 12 volts, though they will draw slightly more power during startup. For example, 4-5 fans on one channel will require ~5w. Also consider that running this many fans will cause some vdrop (resistance) and your "real" voltage may be slightly less than what is expected; ie. 11.5 volts vs the full 12 volts using only one fan (ymmv) and PSU is providing 12v to the fan controller, etc.

Even with the low power draw of the AP14's, don't go cheap on the fan controller.

The Sunbeam PL-RS-6 Rheosmart (SVC) should handle the load pretty well. They also have 3-pin Y-splitters too.
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