Assuming you meant 'cooling fan' - It simply to prevent the processor overheating. Modern processors perform tasks at high speeds - producing vast amounts of heat. The internal circuitry of a processor includes of microscopic strands of wire. If they're not cooled by a fan - the heat generated can actually melt the circuits of the chip !
Processors themselves don't make any noise; it is the cooling fan. The noise a particular computer puts out can vary by model of processor, brand of cooling fan, size of cooling fan, and age of the cooling fan. As such, there is no definitive answer to your question.
A computer fan is any fan inside, or attached to, a computer case used for active cooling. Hope its helps :)
Computer parts can be come VERY hot and if they are not cooled down sufficiently it can ruin your computer. The fan is to cool down the processor.
i'm assuming you mean your computer processor fan. If so, replace it. It's dead!
To cool the processor
The processor (CPU) is on the motherboard inside your computer. It's easy to spot it's location because theirs a fan above it cooling the massive heat sink that's glued with silicon to it.
Most computer processors liberate heat by mounting a metallic heat sink and fan on the processor itself. Gamers' systems may however feature liquid cooling.
Well, the processor is what runs the computer, but with out the other parts it is worthless. It is a big impact on graghics because of the graghics card is faster than the processor, it doesnt matter, the processor can only do so much. But, you can overclock and mutiply, then you start get faster speeds. The only problem with that, is you have to know the limit of the processor and have a good cooler, usally its a liquid cooling system.
nothing to do with the computer, its the processor the determines that (u can get processor upgrades)
Processor
ENIAC processor
The processor is the brain of the computer