Modding TruePower 430

[paco83]

I would like to get a little more exhaust out through my truepower 430 without adding too much more noise. As it is (thermally controlled) the fan runs at around 1700 rpm. That is about 6V, so a 7V mod to the fan won't help too much. Is it possible instead to do a 8.7 volt mod (use the 3.3V line as ground). What color is the 3.3V line? Is this safe? Anyone try this before?

 

[BG4533]

I would beware of this. There isn't a separate 3.3V line you can access, so you would need to splice into it somewhere at the mobo header or in the PSU. The 7V method by using 5V as a ground is somewhat of an unsafe method for some reason or another. Have you considered trying to solder a resistor to the fan wire or purchasing a $5 fanmate so you can pick any speed you wish?

Brian

 

[paco83]

The problem with that is that the fan is thermally controlled, so it's not a matter of slowing the fan down, i need to speed it up. My impression of 7V modding a fan inside the psu, is that i would have to splice a wire anyway, so its just a matter of choosing a different wire. Why would you say that 7V modding is unsafe?

 

[amcdonald]

I know its not what you are asking about specifically, but the best solution would be to splice the wires into a rheostat.

 

[BG4533]

I was suggesting you just hook the fans to a 12V line and run a fanmate in between.

As to why 7 volts may be bad read this post at Silent PC Review.

Many people have used the 7 volt mod including myself without problems, but I wouldn't mess with the 3.3V line just in case. It powers a lot of mobo things that may be more sensitive to these problems.

Brian

 

[paco83]

Ah that makes sense. Damn it that requires me finding the specsheet for the fan again and finding out the current draw so i can figure out the resistor to get. In that case when i rebuild my baybus next week i'll build it to use the thermally controlled fan lines for low instead of the 7v mod (i have 4 case fans 7V modded when baybus is on low).
Thanx for your help.