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H2 Guide- Volt Mod Your Fans

post #1 of 4
Thread Starter 
H2 get 3 speeds out of your fans, a fan volt mod by LC_STiK

Normally, fans run off the 12v rail of our PSUs. This mod guide is for anyone whoe doesn't feel like getting a fan controller but who want to adjust the speed of their fan. This guide will show you how to mod your fan to run at either 7v or 5v, as well as the regular 12v, not to mention that you can always turn your fan off, but if you need a guide for that, then I would suggest turning your computer off and visiting a doctor.


Tools Needed

A knife or other pointy object that is thin but firm.

-note-
5v is red
12v is yellow
grounds are black

Wire Switching
To do these mods, all you have to do is switch wires around. To take a wire out, go to the male end of the molex connector and get your knife. Push the little tabs in while simultaneously lightly pulling that particular pin out. When the tabs are pushed in, the pin will slide right out. After you take two pins out, switch their positions. When putting them back in, make sure the tabs aren't pressed in, otherwise the pins will fall out. To fix this, just get your knife and pry the tabs back the way they should be. The pins should snap into place and not be able to be pulled out when they are inserted.

Those things sticking out are the tabs that have to be pushed in.



DO NOT CONNECT ANYTHING AT ALL EXCEPT FANS TO A MODDED MOLEX! DOING SO WILL DESTROY EQUIPMENT WITHOUT FAIL. YOU CAN CONNECT STUFF BEFORE THE MODDED MOLEX, BUT NOT AFTER!


5v mod

Method A (suggested method)
My preferred 5v mod is to shave the male end of your molex connector down so that it can be flipped and the 5v and 12v rails will be switched. It's faster than the pin method if you constantly switch fans speeds, but it's also permanent.

The connector on the top is what it will look like when you're finished shaving the plastic off.

Method B
This requires switching the 5v and 12v wires. Just switch them, and your fan will run at 5v.

Take the 5v and 12v pins out...

This is what it looks like finished

7v mod

To do this, switch the 5v wire with the ground wire that your fan connects to. (12v-5v=7v)

Take the 5v and this ground plug out and switch them.

This is the result of the 7v mod.


If you ever decide that you need to have your 12v back, just switch the pins around and you're back to stock, no problems at all.


Hope this helps you guys quiet down your loud fans quickly and cheaply.

Enjoy!
My System
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4850e M3A78 4850 4x2GB 
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1TB WD Blac Hanns G 28" Corsair HX 520 TT 8003BWS 
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My System
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post #2 of 4
Rep+ for taking the time to do this Tutorial.
post #3 of 4
Cool beans man...... I think I know how to do this , but just to be sure, what would i need to do to connect my LEDed fan to my hard drive LED plug so it flickers when my HDD is being accessed?
Nemesis
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Nemesis
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 DFI LanParty UT P35 T2R eVGA GeForce 7600GT Crucial Balistix Tracers 2Gb (2x1Gb) 
Hard DriveOptical DriveOSMonitor
300gig Maxtor Lightscribe DVD Vista Ultimate / Ubuntu Samsung 226BW/ I-Inc19"/Balance 13" (Tri-Setup) 
PowerCaseMouse Pad
500W Assassin NZXT Nemesis Elite My leg lol 
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post #4 of 4
Thread Starter 
Hey, sorry I haven't been around the past couple days.

To do the HDD LED thing, all you need to do are cut the wires to your fan LEDs and then splice it into the HDD LED wire on the front of your case. Just make sure you hook up the wires to the correct one on your LEDs.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
4850e M3A78 4850 4x2GB 
Hard DriveMonitorPowerCase
1TB WD Blac Hanns G 28" Corsair HX 520 TT 8003BWS 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
4850e M3A78 4850 4x2GB 
Hard DriveMonitorPowerCase
1TB WD Blac Hanns G 28" Corsair HX 520 TT 8003BWS 
  hide details  
Reply
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