Your coolant level might be low. Your water pump my be broken. Your radiator pipes/buckets might be leaking.
It's possible for the radiator itself to be plugged up. It's usually better to replace it with a new one than have the old one re-cored.
Also, while you're doing that you might want to go ahead and change the thermostat.
Yes, if your fan stops working because your power supply went bad, the CPU could overheat very easily and shut down or even crash resulting in loss of data.
It could be that your head gasket is shot. It may cause your antifreeze to leak, and your engine will overheat.
U NEED A THERMOSTAT. THAT IS WHAT HOLDS THE COOLANT IN THE RADIATOR, SO IT CAN COOL DOWN BEFORE IT GOES BACK IN THE MOTOR.
If you temperature gauge is going up and down then you may have a problem with your sensor. You should take your car to a professional to ensure that you don't overheat your car.
Overheating an engine can cause the engine to see up resulting in a complete engine failure. Overheating the engine can cause the head gasket to fail.
How is the power steering fluid level. A low level might cause more load on the motor when turning.
Using it to long ya dip!
Fan and heat sink
sounds like you could possibly have a bad head gasket. the symptoms are surely all there.
Old coolant begins to break down merely because of the conditions within the engine, being heated and cooling down all of the time. And it can become polluted with dirt and rust particles. Eventually this causes damage to the inside of the engine and radiator, it can clog passages causing the engine to overheat, and cause the engine block and radiator to rust badly from the inside out.
Water is used to cool things down.
You should, unless its parked in a secured structure, where it can not roll away,fall down and cause an liability