Side fan conect to mobo help

Correct, that won't be an issue. In the end though as you add additional cooling solutions I would try to run as much off of the PSU as possible and keep the mobo power for it's processes. Modular PSU cables help to enhance this and of course minimize clutter.

But if you don't power the fan from a motherboard header, there i no chance of controlling the speed with a 3 pin (non PWM) fan based on the CPU temperature.

With a PWM fan (4-pin), there are adapters such that you can get power for multiple fans from a PS molex connector, but the speed control from a 4-pin MB header.

hold on!so it sucks juice that mobo could need else where is psu fan and 1 120 mm fan to much to take from the mobo!?
Why would the pins be there for cpu fan and system fan if they cant be used ?

Not a bit.
If it did they would not put the plugs for the fans on the motherboard to begin with.
One each is fine!

Mike

I say buy quiet fans and run them wide open. If this isn't possible then run them off a quality fan controller off the PSU.

GeneO said:

[/opposing viewpoint]
I like my PWM CPU and my case fans controlled by the processor temperature. They are very quiet most of the time and only noticeable when there is heavy CPU demand.
[/end opposing viewpoint]


Seriously, I think that one or the other is a good option depending on your use.

Done some research and the mobo sys fan has power going to it regardless if a fan is connected.
It says its better to have a fan connected to release the power that stops at the pins,
Kinda like have a live wire with no outlet!more chance of a short e.t,c

I think the idea that not connecting it give the other parts more power is flawed,as they get what ever they need regardless.
If you use a splitter where your running 2 fans of one pin,then i cans ee that pin becoming strained,But thats the only reason i can think of why not tot use the pins
good logic or bad?