Scientists have thought that magmas that form new crust at fast-spreading ridges rise up from the depths, quickly crystallize, and then push away from the ridge to form new ocean floor.
To stop a computer from overheating never keep a cloth or something else on the CPU or monitor. Also use the save energy option from properties so as to switch off the monitor when not in use. This will always help in keeping the computer cool and not overheating it.
If you decide to overclock your components, make sure you have a good cooling system that can keep your components from overheating. One additional advice when overclocking is to gradually increase the clock rate of your component and monitor the temperature in order to avoid causing any serious damage.