Alec Mowat said:
SP for CPU cooling, AF for case cooling.
You will want to pair the fans on the cooler, or it could be noisy or won't work correctly, as one fan will be sucking more air or spinning faster.
Push-pull out of the tower is fine. Two new fans will make a good environment.
Thanks for the tip. I could get 2 SP fans, but I'm not sure how to attack it to my case. The current fan is attached to the case with 4 of those small thick screws like these
http://www.gbeelectronics.com/gbe/components/com_virtue...
I don't know where to get screws to attach one fan to the case and radiator or to just attach to other to the radiator. As far as I know they only come with the case screws.