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.
My cpu never goes over 32 Celsius and I'm overclocked to 4.1ghz. My cpu fan is laid back at around 730 rpm. Aftermarket cpu cooler is a necessity if you are going to overclock.