I have an i7-930 cpu with an Enermax cooling fan (i don't remember the model) for several years. Until now everything worked fine, but the last few days i noticed that the computer is getting more noisy, especially when i make it work harder (for example opening many tabs on Chrome). On some occasions Chrome got really slow and one time there was an alarm - maybe a warning for overheating. On the other hand i started checking SpeedFan on a regular basis and didn't notice any dramatic change on the temprature of the cpu and cores?
I didn't find the right solution from the Internet.