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fan controller help

post #1 of 13
Thread Starter 
I need some help selecting a fan controller for a set of 6 rad fans, heres a link to the fans. http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=36_1130_49_1050&products_id=34190

I want to stay cheap. Functionality is more important than looks. I dont mind DIY.
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post #2 of 13
Rheostst

Or just use a double pole switch off of the 5v and 12v from a molex.
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post #3 of 13
Thread Starter 
How do I know how many watts a fan produces? Like what is the formula?
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post #4 of 13
Thread Starter 
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(6) Swiftech Helix 120MM 9-Blade Z-Bearing Fan ... (10) XSPC G1/4" to 1/2" ID, 3/4" OD Compression... PrimoFlex Advanced LRT Tubing - 1/2in. ID X 3/4... (2) EK-PSC Adapter 45° G1/4 Nickel 
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post #5 of 13
Quote:
Originally Posted by hucklebuck View Post

How do I know how many watts a fan produces? Like what is the formula?

P(W) = I(A) × V(V)
or
Watts = Amps x Volts

You need to know the rated Amps of your fans (usually stated on the fan hub sticker) and then you're good to go!

i.e. - power of a GT AP-15 at 12v (GTs are rated at roughly 0.083A)

0.083 x 12 = 0.996 Watts

thumb.gif
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post #6 of 13
Thread Starter 
Now if I can find a dial (rheostat) spliced molex connector I would be set. Or just a simple fan controller for a molex plug. headscratch.gif
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AMD FX-8320 ASUS SABERTOOTH 990FX R2.0 MSI R7950-3GD5/OC BE Samsung 8GB DDR3-1600 (PC3-12800) 
Hard DriveOptical DriveCoolingCooling
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(6) Swiftech Helix 120MM 9-Blade Z-Bearing Fan ... (10) XSPC G1/4" to 1/2" ID, 3/4" OD Compression... PrimoFlex Advanced LRT Tubing - 1/2in. ID X 3/4... (2) EK-PSC Adapter 45° G1/4 Nickel 
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Hard DriveOptical DriveCoolingCooling
SAMSUNG SSD 840 Liteon IHAS 524 DVD writer  XSPC Raystorm CPU Waterblock (2) EK-PSC Adapter 90° G1/4 Black Nickel 
CoolingCoolingCoolingCooling
EK Radeon HD 7950 VGA Liquid Cooling Block Alphacool NexXxoS XT45 Full Copper 360mm Radiator Swiftech MCP655 XSPC Single Bay Reservoir 5.25" 
CoolingCoolingCoolingCooling
(6) Swiftech Helix 120MM 9-Blade Z-Bearing Fan ... (10) XSPC G1/4" to 1/2" ID, 3/4" OD Compression... PrimoFlex Advanced LRT Tubing - 1/2in. ID X 3/4... (2) EK-PSC Adapter 45° G1/4 Nickel 
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post #7 of 13
Quote:
Originally Posted by friskiest View Post

Quote:
Originally Posted by hucklebuck View Post

How do I know how many watts a fan produces? Like what is the formula?

P(W) = I(A) × V(V)
or
Watts = Amps x Volts

You need to know the rated Amps of your fans (usually stated on the fan hub sticker) and then you're good to go!

i.e. - power of a GT AP-15 at 12v (GTs are rated at roughly 0.083A)

0.083 x 12 = 0.996 Watts

thumb.gif

Don't forget startup surge.
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My System
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FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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post #8 of 13
Quote:
Originally Posted by hucklebuck View Post

Now if I can find a dial (rheostat) spliced molex connector I would be set. Or just a simple fan controller for a molex plug. headscratch.gif

That's really, really sinple to make.
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My System
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Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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post #9 of 13
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

That's really, really sinple to make.

How? and where do I get parts?

I tried doing something like this years ago and the rheostat burned out. Must have used the wrong one.
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CoolingCoolingCoolingCooling
(6) Swiftech Helix 120MM 9-Blade Z-Bearing Fan ... (10) XSPC G1/4" to 1/2" ID, 3/4" OD Compression... PrimoFlex Advanced LRT Tubing - 1/2in. ID X 3/4... (2) EK-PSC Adapter 45° G1/4 Nickel 
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Movin' on Up
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EK Radeon HD 7950 VGA Liquid Cooling Block Alphacool NexXxoS XT45 Full Copper 360mm Radiator Swiftech MCP655 XSPC Single Bay Reservoir 5.25" 
CoolingCoolingCoolingCooling
(6) Swiftech Helix 120MM 9-Blade Z-Bearing Fan ... (10) XSPC G1/4" to 1/2" ID, 3/4" OD Compression... PrimoFlex Advanced LRT Tubing - 1/2in. ID X 3/4... (2) EK-PSC Adapter 45° G1/4 Nickel 
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post #10 of 13
Quote:
Originally Posted by hucklebuck View Post

I want to stay cheap. Functionality is more important than looks. I dont mind DIY.

If you like DIY, you can do what I did wink.gif



Basically I wired a custom fan controller, with on-off switches as well.

Stuff I used:
12x 0-100 Ohm variable resistors (those round knobs), 1 euro each from a local DIY store
12x flip-switches, 50 cents each from a local DIY store
3x "molex to 4x 3-pin fans" cables, 1 euro each from a local computer store
a few meters of regular wire Free for me since I stripped them from an old broken PSU
a dremel to cut the holes in the front panel
-> total cost roughly 20 euro, excluding the dremel, and I got a 12-fan fan controller with full on-off functionality

Basically the wiring was as follows:
- cut all of the "molex to 4x 3-pin fan" cables in half, so that i got the molex side, and the 3-pin fan side both with wires
- solder extra extension wires to the 12V and ground wires of the molex connectors
- soldered a switch to each of the 12 "extension wires" coming from the 12V wire
- soldered some more wire to the other end of the switches
- soldered the 0-100ohm VR knobs to each of these wires
- soldered some more wire to the other end of the VR's
- soldered the + wire of each "3-pin fan" header into the 'extension wires' coming from the VR's
- soldered some more wire to the - wire of each "3-pin fan" header
- soldered all of these into the ground wire of the molex connector

so basically the "circuit": molex +12V -> flip switch -> VR -> fan header + -> fan header - -> molex ground, where there was 12 of those in parallel, all sharing the same molex plug though, so I needed only one molex from PSU to drive all 12 fans. biggrin.gif

(note: the six "1/0 switches" on the topmost row are on-off controls for the RGB leds inside the case, unrelated to this "fan controller")
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