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Fan control for lots of fans help.

post #1 of 3
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Hey all, I have just received my 900D and 15 Scythe GTs. I still have a few more parts to buy before I can start my build and I just planning how to control all of those fans possibly 20+ in total.
My issue is that the scythes come with a short 3 pin cable which is not ideal when working with such a big case.
This is my first major watercooling build so I'm doing alot of research and planning before ordering any parts. At this point I have explored a few different products but they all fall short in some way. the first is the NZXT grid http://www.nzxt.com/product/detail/123-grid-fan-hub
Now this is potentially a good solution but without having a control cable and extra Molex power I'm not sure that my fan controller will output enough (30 watts per channel) to power 10 fans, as I would like to run a control cable from my fan controller to control the RPMs manually for low noise.

The second product is this from Swiftech http://www.swiftech.com/8-WayPWMsplitter.aspx but the fans I have are not PWM and I'm told by Swiftech that you can run it with non PWM fans but cannot run a control cable to a fan control due to it being wired for PWM only, it simply will run off the molex power causing the fans to run at full speed all the time which is not what I want.

there are also the PCBs which can connect multiple fans but once again are only Molex connected and have no control port. Im a bit stumped at this point any suggestion would be appreciated, thanks in advance.thumb.gif
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Backbreaker
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post #2 of 3
You can use the fan splitter boards

They only join the two power wires together so what you need to do is solder two of the RPM wire contacts together.

Now one fan header is the input and all the others are outputs with only the first one sending the fan RPM's back.
The Molex connector can just be cut off completely if you want.

There is also just normal splitter cables

But they sometimes mean disconnecting the RPM wires of all but one of the fans one each channel. It isn't hard to though, just pop the pin out of the 3 pin plug and leave it dangling so you can put it back in if you need to use it again.

Unless you use PWM fans you can't use power straight from the PSU at all. You need have the power coming from the fan controller. Scythe GT's are very efficient fans and 30 watts will power a heap of them ... much more than 10.
Edited by Jakusonfire - 6/1/13 at 10:28am
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by Jakusonfire View Post

You can use the fan splitter boards

They only join the two power wires together so what you need to do is solder two of the RPM wire contacts together.

Now one fan header is the input and all the others are outputs with only the first one sending the fan RPM's back.
The Molex connector can just be cut off completely if you want.

There is also just normal splitter cables

But they sometimes mean disconnecting the RPM wires of all but one of the fans one each channel. It isn't hard to though, just pop the pin out of the 3 pin plug and leave it dangling so you can put it back in if you need to use it again.

Unless you use PWM fans you can't use power straight from the PSU at all. You need have the power coming from the fan controller. Scythe GT's are very efficient fans and 30 watts will power a heap of them ... much more than 10.
Hey man thanks heaps for the info you've obviously put a bit of time into it, I will continue to research because at the moment I've got a 900D sitting in a box and I am about to move house in a few weeks so no point starting a monster build now, but once again thanks. I might PM you if I need a tip or two, repped:thumb:
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256gb Samsung 840 pro 1 X Samsung 2tb HDD OCZ Vertex 2 60GB OCZ Vector 128GB 
CoolingCoolingCoolingCooling
XSPC Raystorm Copper edition  XSPC RIVE Chipset and VRM block  3 X XSPC RAZOR Titan Blocks and Backplates  2 X Alphacool D5 pumps  
CoolingCoolingCoolingCooling
Bitspower Dual pump Top  2 X Alphacool UT60 480 Radiators  1 X Alphacool XT45 240 Radiator  Phobya Balancer 250 Black Nickel  
OSMonitorKeyboardPower
Windows 7 ultimate 64 bit Acer X34 Predator CORSAIR K90 VENGEANCE  CORSAIR AX1500i 
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I7 980X @ 4.5Ghz - 1.36 Vcore ASUS RAMPAGE EXTREME III EVGA GTX TITAN EVGA GTX TITAN 
RAMHard DriveOptical DriveCooling
12 GB CORSAIR DOMINATOR GT 2000MHZ TRIPLE CHANNEL OCZ VERTEX2 60GB and Samsung 2tb HDD LG BLURAY BURNER XSPC DUAL BAY LAING D5 PUMP RES COMBO 
CoolingCoolingOSMonitor
XSPC RAYSTORM COPPER CPU BLOCK BLACK ICE STEALTH 240 RAD WINDOWS 7 64BIT ULTIMATE ASUS VG278h 120Hz 
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Backbreaker
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CPUMotherboardGraphicsRAM
I7 3930K @4.8 RAMPAGE IV EXTREME Gigabyte GTX 1080 G1 Gaming  16 GB GSKILL RIPJAW Z 2133 
Hard DriveHard DriveHard DriveHard Drive
256gb Samsung 840 pro 1 X Samsung 2tb HDD OCZ Vertex 2 60GB OCZ Vector 128GB 
CoolingCoolingCoolingCooling
XSPC Raystorm Copper edition  XSPC RIVE Chipset and VRM block  3 X XSPC RAZOR Titan Blocks and Backplates  2 X Alphacool D5 pumps  
CoolingCoolingCoolingCooling
Bitspower Dual pump Top  2 X Alphacool UT60 480 Radiators  1 X Alphacool XT45 240 Radiator  Phobya Balancer 250 Black Nickel  
OSMonitorKeyboardPower
Windows 7 ultimate 64 bit Acer X34 Predator CORSAIR K90 VENGEANCE  CORSAIR AX1500i 
CaseMouseMouse PadAudio
CORSAIR 900D Razer Deathadder black edition  Razer Goliathus XL ROG Xonar Phoebus 
Audio
Sennheiser PC363D  
CPUMotherboardGraphicsGraphics
I7 980X @ 4.5Ghz - 1.36 Vcore ASUS RAMPAGE EXTREME III EVGA GTX TITAN EVGA GTX TITAN 
RAMHard DriveOptical DriveCooling
12 GB CORSAIR DOMINATOR GT 2000MHZ TRIPLE CHANNEL OCZ VERTEX2 60GB and Samsung 2tb HDD LG BLURAY BURNER XSPC DUAL BAY LAING D5 PUMP RES COMBO 
CoolingCoolingOSMonitor
XSPC RAYSTORM COPPER CPU BLOCK BLACK ICE STEALTH 240 RAD WINDOWS 7 64BIT ULTIMATE ASUS VG278h 120Hz 
KeyboardPowerCaseMouse
CORSAIR K90 VENGEANCE  CORSAIR AX1200 CORSAIR GRAPHITE 600T WHITE RAZER DEATHADDER BLACK EDITION 
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RAZER GOLIATHUS XL SENNHEISER PC360 G4ME ROG ASUS XONAR PHOEBUS 
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