DIY Tutorial : Volt Mod ur Case fans ( My own Tutorial )..finally :D

[shajeel]

Ok guys many ppl have been asking me how to do voltmod ur case fans to make them quite...

So here is DIY tutorial on this( well For some ppl )..lol but no its not that difficult...



SO here we GO !!




Normally, fans run off the 12v rail of our PSUs. This mod guide is for anyone who doesn't feel like getting a fan controller but still wants 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....THis guide is extremely helpful for those loud ass Nidec and delta massive cfm fans....



Tools Needed


1. A knife or other pointy object that is thin but firm...preferably a small precision flathead screwdriver...

2. a Nail Filer or the likes




Wire Legend


5v is red
12v is yellow
grounds are black ( there are 2in every molex )




First off....wire switching Method


To do This mod by the wire switching method, all you have to do is switch wires around. To take a wire out, go to the Female end of the molex connector and get your knife or flat head precision screwdriver. 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.



Here is how the pin looks like....








DO NOT CONNECT ANYTHING AT ALL EXCEPT FANS TO A MODDED MOLEX! DOING SO WILL DESTROY EQUIPMENT WITHOUT FAIL !





Since the technique is now covered...now for the actual MOD...




The 5v MOD



Method 1 ( the Suggested method as its easier...)


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 in the pic below is what it will look like when you're finished shaving the plastic off with a filer or some sanding tool....










Method 2



This method requires switching the 5v and 12v wires. Just take the pins out and switch them, and your fan will run at 5v.


First u Take out the 5v and 12v pins from the female end(the one in which a plug from the PSU goes into)....(see pic for details)





And u just switch the places of the 12v and 5v wires....








^^^ this is what it looks like once finished...



Now for the 7V mod....



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



This pic below shows the 5v(yellow) and ground(black) wires taken out for switching....









And here 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.




Disclaimer: Although This mod has been confirmed by millions to be successfully working...I am not in any way responsible for any damage that this mod may cause to ur pc...

WHAT !!?? nobody appreciates hard work? :S

[SyNcViEw]

Its good, but I'm sure your pictures and the description isn't good enough.

"To do This mod by the wire switching method, all you have to do is switch wires around. To take a wire out, go to the Female end of the molex connector and get your knife or flat head precision screwdriver. 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."

^^Try explaining this with pictures.. would be A LOT easier for people to understand..

[maz9009]

Thanks for the guide dude.

Is there a way to change silent fans with little airflow into a bit noisy but good airflow ones? Maybe by over-volting them without the risk of burning them...

[mave_3]

Nice guide.......
goood share.........!!!!!
will try some day

[shajeel]

well maz atm there is no way to overvolt the fans...:S

but heyy if i do come across one...no matter how ghetto it is...i'll let u know man....

and thanks a lot mave_3....


finally some ppl took the liberty to reply...i was thinkin that i wasted my time making this guide :S ...but now its good

[opethian]

... gr8 stuff shajeel ...

[SyNcViEw]

Originally Posted by shajeel

well maz atm there is no way to overvolt the fans...:S

but heyy if i do come across one...no matter how ghetto it is...i'll let u know man....

and thanks a lot mave_3....


finally some ppl took the liberty to reply...i was thinkin that i wasted my time making this guide :S ...but now its good

There can be one though. Connecting the +12V +5V together and their respective grounds would give you 17 Volts, wouldn't it? :P

[maz9009]

Originally Posted by SyNcViEw

There can be one though. Connecting the +12V +5V together and their respective grounds would give you 17 Volts, wouldn't it? :P

Nopes... Voltage is the potential difference between two points. +12v gives +12v because the ground wire is set at 0v. If you replace the ground wire with +5v potential difference will be +12v-5v=7v. If you replace that ground wire with a -12v wire taken out directly from a PSU it will give 24v to that fan. It will probably spin at double speed and give double airflow but it will only last a few minutes maybe seconds followed by it's soul coming out in the form of white smoke

@Shajeel
Boss that guide is awesome... It's today that I have modded some fans to run at 7v by using the method you described in your guide. A belated + rep for you...

[SyNcViEw]

Hmm.. i know that, but instead of replacing that with a -12v ground wire, why not a -5V ground wire, in this case, the output would be 17v?

I'm just asking to clear my concept people. Don't go for it :P

[maz9009]

Originally Posted by SyNcViEw

Hmm.. i know that, but instead of replacing that with a -12v ground wire, why not a -5V ground wire, in this case, the output would be 17v?

I'm just asking to clear my concept people. Don't go for it :P

That would put less burden on fans and they will most probably last a few seconds longer