am I looking for trouble? (to quiet down my psu's fans)

[SpeedEng66]

I have a m-atx psu with 2 60mm fans on them
and they are loud!!! (my htpc build)

im thinking about wiring them into a series circuit to them
(to add more resistance using the same voltage= slower fans= less noise)

now I guess im wondering by doing this the psu will be less cooled is that a problem?

edit opps sorry I thought this was the PS section!!

 

[Cheezeit]

Im pretty sure putting them on series won't do anything because the amerage on any one of the fan lines is enough to support a second one running at full voltage. What you could to is put in a resistor or try to add a larger diameter fan.

 

[SpeedEng66]

fan = resistance (resistor) in a series circuit

larger fans are not an option it's a really really small psu in a slim case

 

[yh125d]

Originally posted by: Cheezeit
Im pretty sure putting them on series won't do anything because the amerage on any one of the fan lines is enough to support a second one running at full voltage. What you could to is put in a resistor or try to add a larger diameter fan.

Wiring the fans in series would double the total resistance, however it would likely not affect the fan speed for the reason you mentioned

 

[Zepper]

Actually, if you put them in series, each fan will have 6V to work with. Some fans won't even start at 6V. I've on occasion, brought the fan lead out of the PSU and run it/them off my fan controller. I don't recommend that as you may be risking your PSU if they come disconnected, etc. Putting a fixed resistor in series with the fans might work, but then you'd have to determine what the best balance for safety and lower noise is. I once used a fan adapter to replace the 80mm fan in a Zippy PSU with a 90mm fan like this: http://www.techimo.com/photo/showphoto.php?photo=9079 and I've also replaced one with a thermally controlled 80mm fan from Vantec. IDK if you could find a thermally controlled 60mm fan out there...

.bh.

 

[SpeedEng66]

I picked up two vantec stealths 60mm
(testing was done on my work bench)
@ full speed there's still a slight hum
in series it's slightly less audiable (but still there) and yes it runs at half the speed (tested on a p35 fan controller)

3.1k alone
1.8k series (well almost half lol)

going to put it together in the morning and see..

 

[SpeedEng66]

Originally posted by: Zepper
Actually, if you put them in series, each fan will have 6V to work with. Some fans won't even start at 6V. I've on occasion, brough the fan lead out of the PSU and run it/them off my fan controller. I don't recommend that as you may be risking your PSU if they come disconnected, etc. Putting a fixed resistor in series with the fans might work, but then you'd have to determine what the best balance for safety and lower noise is. I once used a fan adapter to replace the 80mm fan in a Zippy PSU with a 90mm fan like this: http://www.techimo.com/photo/showphoto.php?photo=9079 and I've also replaced one with a thermally controlled 80mm fan from Vantec. IDK if you could find a thermally controlled 60mm fan out there...

.bh.

I thought about using a fan adapter to a 80mm (internal in the case) but it just came alittle too close to the hd's cables
and didnt want to use it on the outside (tryin to keep it clean look)