How to do the 7 volt trick

[bleuiko]

Is it hard? I have a vid fan I want to convert... its running at 5500RPM... and I really don't need it to be that loud...

Any guide? and yes i tried google.. but i think some of those guides are making it more complicated than it need to be... help!

 

[Gene396]

The seven volt trick is easy. There are three wires: a 12 volt, a 7 volt and a ground wire. I forgot what color is which. Just use a volt meter to find the correct one. I had a Delta fan turning 6800 RPM and put the 7 volt wire in the place of the 12 volt line conection to fan. Using seven volts dropped RMP to 4500 -- too low. Suggest placing different resistors in 12 volt line to drop voltage. Settled on 5 ohms which dropped RMP to 6200. Also; try using spacers between HS and fan. Between 1/8 and 1/4 inch shoud be correct. A lot of the time the fan is in "dirty air" due to nearness of fan and HS. My RPM dropped another 200 RPM!! The scream was gone and because the fan slowed down (loaded up) it was pushing more air without the excess noise!!!!

Try it -- good luck.

Gene

 

[Fireman]

Try this easy step by step tutorial. http://www.overclockershideout.com/7voltmod.shtml

 

[lsman]

the famous fanbus

 

[Hybris]

o m g... what are they doing at oc-hideout? fell and hurt their heads or something? why cut and crimp when you can just pull out and push in?
Just push out the pins and push them in where they should be. Sweet Jesus...

 

[bleuiko]

hybris, i like the way you think... so what exactly do i switch? any guide to do it the easy way? i switch the pins on the connector from the PSU right?

 

[Crucial]

Wow those steps from ochideout are completely unedessary. What a waste of time.

 

[Crucial]

found this page with some easy to understand pics