I had this computer stand that had a fan inside it that was USB powered. The stand broke but the fan still works fine. Is it worth saving for the fan? I'd used SMC FanControl when my computer seemed to be running real hot...but on another thread, I was told that program is kind of superfluous and the computer can get hot but knows to take care of itself. So, is having a fan to put it on something unnecessary? Or will it prolong the life of my computer?