I will be running a gaming computer into the define r4 case. I will be running these fans in the front as intake http://pcpartpicker.com/part/noctua-case-fan-nff12pwm, they are designed for tight spaces due to the face that the front of the r4 has no space. Note that these are PWM fans and the mother board I am using has 4 pwm fan headers, the msi gaming 7. Now, pwm means that I can control the speed and stuff through some technology. But I don't know if they will reach, so how can I find those out? Also I will be running this as a rear exhaust http://pcpartpicker.com/part/be-quiet-case-fan-bl047. Note that this isnt pwm but I am able to put it in the PWM header? Finally, I will be running this cpu cooler http://pcpartpicker.com/part/be-quiet-cpu-cooler-bk013 which will cool an i5. This cpu cooler does come with a good fan, so I wont change it. I dont think this fan is pwm either. So will I be able to plug it into a pwm or is it better to plug it in to cpu fan header? I don't know if the motherboard will control this fan if plugged into the cpu fan header. Also I would like to control all these fans if possible.
The CPU cooler fan IS PWM and should always be plugged into the CPU fan header.
You can also use 3 Pin non PWM fans on a 4 pin header.
Regards how long the leads are on the Noctua NF-F12 PWM, the data sheet has them listed at 30cm
http://www.noctua.at/pdf/infosheets/noctua_nf_f12_pwm_datasheet_en.pdf
Thats around 11inches do you think that is enough to reach motherboard, and is there an adapter which I can extend the cable?