PWM controlled case fans from GPU signal

[Hybridtheory]

I was wondering is it possible to split/splice off the pwm signal from a gpu fan and use that to control all my case fans, of which would be separately powered by a molex connector ?

I wouldn't want to alter the original GPU fan wire, but I've seen a 4 pin extension cable for GPU fans so i could mod this, then this would plug inline with the PWM signal spliced off

Is this feasible ?

Basically what i want is my case fans/or a selection of case (I have 7 in total) fans to ramp up/slowdown along with my GPU fans

What do you think ?

 

[Hybridtheory]

Yeah I figured he'd be the man to ask about this =D

I'll wait till he chimes in on this thread to get his thoughts on it.

It's starting to be a right pain in the backside to get out of my chair to turn my case fans down when i wanna just browse the net in between gaming lol

 

[Hybridtheory]

Why can't you just use the PWM control provided by all but one of the motherboard headers?



How did you end up with a system in a Fractal R3 that requires 7 fans, and is obviously noisy enough to be annoying?



Have you just tried running the fans slower all of the time? With the number of fans you mention you should be able to keep the temperatures down to a reasonable level without having excessive noise.

TBH I've not even tried it at the moment, it is something I'm trying this week as im off work, maybe i'm looking too deep when there's a simpler solution

Well i started off with the 2x120mm fronts and 2x140mm rears and this i could have set pretty much silent with just 1x7950 oc'd hovering around 60-65c
Now i have 2x 7950's oc'd in crossfire temps are more of an issue, both cards are getting up to late 80's early 90's until i added the other case fans.

The noise of the extra case fans is much much lower then 2x Twin Frozr coolers near full whack, these are loud when over 60%

The case as it is now with 7 fans isnt terribly loud i'd just like it to be able to auto turn down to the lowest fans speeds when not gaming with out any intervention from me and up full when i do

 

[Hybridtheory]

I been messing this afternoon and it appears that my new corsair tx850 psu is probably the loudest fan i have in my case looking around on the net seems like others have it too.

After that my side intake is the next loudest, all the other are pretty quiet, maybe i should cut the honeycomb section out ?

I heard Fractal were doing replacement side panels that were windowed, I've not seen any available to buy tho of know if they have fan holes cut