• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

Wire stripping to speed up fans?

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.

future

Registered
Joined
Mar 15, 2001
I heard that you can switch the wires around on a three pronged fan or hook them up to the big four pronged wires that come out of the power supply.

I also have a little fan that is powered from the four pronged into two wires that are black and red.

If you guys don't have a formula maybe you can tell me what the heck all these colered wires are( positive/negative/ground).
 

Crazy Jayhawk

Member
Joined
Jul 14, 2001
Location
Hutchinson, KS
For a 3-pin connector: Red = +12V, Black = Ground, Yellow = RPM signal. Motherboard monitoring programs use this to tell you how fast the fan is turning.

For a 4-pin hard-drive type connector: Red = +5V, Black = Ground, Yellow = +12V.
 
OP
F

future

Registered
Joined
Mar 15, 2001
Thank you.

Now to see how fast I can burn out a fan motor!
 

maha_x

Member
Joined
Jul 25, 2001
Location
Rovaniemi, Finland
To answer your first question, yes, you can hook those smaller red and black to that larger 4pin conn. from the PSU. But it wont give you more voltage / fan speed. You cant get higer voltage out of your PSU w/o some special comp. But you could try to hack your fan, as it possibly has a resistor to set its current (amps) and thus protect the coil from burning. Soldering another resistor into parallel with it would decrease the overall resistance and allow greater current trough the fan -> more power -> more speed. The risk is that the coil will burn, meaning that each winding melts into another short circuiting the coil thus moving all wattage to the resistors, which under too much wattage could burn and short circuit also, short circuiting the whole PSU or mobo PS. Also I wouldnt try draw too much power from the mobo anyway... Oh and the fan reliability gets hurt too.

If you choose to undertake such mod, I cant qarantee that any of my saying is correct. It is just what has been thought to me and what I have learned during my studies. Its your risk.
 

cjtune

Member
Joined
Dec 18, 2000
Hey maha_x you know your DC motor speed control well! Yup, that's speed control above rated by adjusting field coil current. But it'll be difficult to work on the tiny PCB insde the fan let alone cracking open a tiny DC fan.

You can get 12+5=17V by tapping into the main power line (that connects to your mobo) but I highly discourage that not so much because of wear on the fan, but any mis-wiring and ZZZAAAAPP! crackle! *poof*