CNPS10X add-on fan

[antwanman12]

Im looking at the Zalman CNPS10X Flex heatsink and I see that I need a 120mm fan. Can I add any old case fan or do I need a fan specific to this heatsink?

Thanks

 

[avatar_raq]

You can add the same fan if you are satisfied with its airflow and noise. If it has a 3 pin connector you can connect it to the mobo and have the mobo controlling the RPM (better), if it has 4 pin molex, then you must connect it to the PSU directly, but it'll run at full speed.
If you can afford to buy a new fan I recommend this one:
Scythe Slip Stream 120mm x 25mm PWM Fan - (SY1225SL12LM-P) 11$

http://www.frozencpu.com/products/10026/fan-639/Scythe_Slip_Stream_120mm_x_25mm_PWM_Fan_-_SY1225SL12LM-P.html?tl=g36c365s936
It has PWM control and excellent airflow to noise ratio.