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Best way to reduce fan speed to 5 and 7 volt

post #1 of 6
Thread Starter 
Hello,

So there are a few ways to do it.

1. With the mod method feeding the psu back voltage.
2. With ohm resistor
3. With Voltage regulator LM780X
4. With Bios fan speed control.

Which one is the best? 1 and 2 has negative effects. How long does it take for a ohm resistor like the Zalman RC56 to burn out?
Perhaps the best way is just to adjust volt/speed in bios?
post #2 of 6
Quote:
Originally Posted by kiario View Post

Hello,

So there are a few ways to do it.

1. With the mod method feeding the psu back voltage.
2. With ohm resistor
3. With Voltage regulator LM780X
4. With Bios fan speed control.

Which one is the best? 1 and 2 has negative effects. How long does it take for a ohm resistor like the Zalman RC56 to burn out?
Perhaps the best way is just to adjust volt/speed in bios?

A good ohm resistor will be fine long term. Some FC's also have the ability to reduce voltage, not via PWM control. I've used both with great results.
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post #3 of 6
I suggest either getting an actual fan controller, OR just letting the BIOS take care of it.

As long as the fan controller isn't from the bargain bin, it will probably outlast the fans themselves. And the bios does a pretty good job of it, atleast mine does.

If this helped please hit the rep button!
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post #4 of 6
Thread Starter 
Thanks. Yes i have ordered a lamptron fc5 v3. I hope it will give out exact volt signals without variance
post #5 of 6
Just to let you know, when I written FC, that means Fan Controller.
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post #6 of 6
To take some Nidec TA450DC's down from 12V to 5V, I used a Sunbeam 4-pin Molex to 6x 3-pin fan header adapter, and made my own extension cable for the Molex feed.
I used some Molex connectors I had lying around, some cheap Molex pins I got from eBay, and a wire stripper/pliers.

Here's the layout:
 
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Asus K55A
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Pentium G3258 MSI Z97 PC Mate PNY GTX 650 2GB 4GB Corsair XMS3 
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Seagate 1TB SSHD M500 120GB LITE-ON iHAS124-14 Stock 
OSMonitorMonitorKeyboard
Win7 Professional 64bit LG W2253 HP 1502 Nixeus Moda 
PowerCaseMouseMouse Pad
Corsair CX600M Rosewill FBM-02 Razer Abyssus Mirror Razer Goliathus alpha control, Razer Goliathus ... 
AudioOther
Plantronics RIG 7.1 BYTECC U3-225 3.5" 2x USB 3.0 + 2x 2.5" HDD/SSD... 
CPUMotherboardGraphicsRAM
Intel i5-3210M CPU @ 2.50GHz Asus K55A Intel HD Graphics 4000 Elpida 4GB DDR3 
Hard DriveOptical DriveCoolingOS
Seagate Momentus 500GB Matshita DVD-RAM UJ8C0 Stock CPU Fan Win7 Home Premium 64bit 
MonitorPowerCaseAudio
1366x768 15" Glossy Laptop Screen Stock battery and wall adapter Asus K55A chassis Factory Altec-Lansing speakers 
CPUMotherboardGraphicsRAM
Atom N270 Asus 1005HAB Intel Integrated 2GB DDR2 
Hard DriveOptical DriveCoolingOS
OCZ Agility Series OCZSSD2-1AGT30G 30GB SATA II... Stand-alone external USB Stock Windows 7 32bit 
MonitorKeyboardPowerCase
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Mouse
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