How do you undervolt a fan?

[Detonate]

I've googled and everything, and the only thing I found helpful was a guide to undervolt an led fan. I don't use led fans. So can somehow show/link/direct me to how I can undervolt a fan to 5v and/or 7v. Thank you.

 

[matt00926]

http://www.silentpcreview.com/article6-page1.html

For 5 and 7v

 

[diredesire]

7volts.com
the first hit for "7 volt" is what you're looking for...

 

[Arcygenical]

An LED fan undervolts the EXACT same way as a non-LED fan, just... you know... without the lights.