some computers don't need fans at all, but if your case came with a fan you probably need it. cases are designed with airflow in mind so if the fan breaks everything gets out of wack. without a case fan the heat from your cpu has nowhere to go; it just recirculates in the case this will cause problems. a case fan is cheap and very simple to put in (4 screws & 2 wires, I usually pull them out of old AT power supplies so they are free for me.) so if you think you know more about cooling your case then the guy who designed it go ahead and melt your cpu.
Last edited by johnson_steve; 07-01-2006 at 10:58 AM.