did 7volt mod on psu fan with temp control antec 403x

el_ · Post by **el_** » Tue Apr 05, 2005 9:56 pm

I modded my powersupply and got noise to nothing but I took power from temp controlled pcb and stole 5volt rail from old bx style connector that I don't need(bye bye warranty). Any thing wrong with that mod? Any other good 12v-7volt fans that I could replace the 80mm Adda which is in there now?

btw no shocks and I let the power drain/button press a couple of times too.

frankgehry · Post by **frankgehry** » Tue Apr 05, 2005 10:12 pm

Panaflo, nexus, papst, yate loon

yeha · Post by **yeha** » Tue Apr 05, 2005 11:22 pm

as far as power supply fan swaps go, i'm too timid to go with low-flow fans. i'd go with a 12v ball-bearing temperature-controlled model, like a coolermaster daf-b82 ($6, 1000-2500 rpm from 23-50 degrees c) or nmb 3110kl-04w-b66 ($3, 1200-3600 rpm, degree range = ??).

but i'm a girlie-man like that. i had one psu go into meltdown a month after swapping the fan with a fixed-speed nmb b19 (1500 rpm?).

Aleksi · Post by **Aleksi** » Wed Apr 06, 2005 5:11 am

Just a thought about your fan connection:

If the temp controlled voltage goes below 5V, then it would actually be the other way around. 5VSB as VCC and the temp controlled voltage as the GND. So the polarity would be reversed considering the fan.

So not really sure what kind of circuit it is and what components are used. Basicly a matter of how much current the component giving the voltage can sink. But then again, it has the wrong polarity, so the fan shouldn't spin...

Haven't really thought about this kind of option before, I'd have to test it to know how it reacts.

el_ · Post by **el_** » Wed Apr 06, 2005 9:51 am

yeah I was thinking the same thing. So far it works fine and temps seem low for the case 23C so I'm not worried but the life of the power supply may be shorten than normal if the fan stops turning doesn't start up at the correct voltages.

el_ · Post by **el_** » Tue Apr 12, 2005 12:32 pm

update install this in big antec full tower.

I took yeha advice and modded the psu again!!!

I removed the fan and cut a 120mm panaflo M running at 7volts blowing in from below. so it is blowing up onto the heatsinks and passively pushed out of the back.

one question did I void my warranty!?

Aleksi · Post by **Aleksi** » Tue Apr 12, 2005 12:39 pm

Yes, you did void your warranty.

did 7volt mod on psu fan with temp control antec 403x

did 7volt mod on psu fan with temp control antec 403x

p, n, p