I know its minor but, the fan (70mm Sq) sitting on top of the cpu is close to the sweet spot where it drifts in and out of a very noticeable whine. I am sure it changes speed due to cpu usage. Question, has anybody or is it possible to just change out the fan that is on top of the heat sink fins. There are no screws visible, hope it is not glued on or ?? Its a factory AMD cpu fan/cooler