The possibility of computer overclocking depends on two components: from the user’s desire and from the capacity of a particular computer. It often happened that when a user buys rather expensive machine with the components perfect for overclocking, non-qualified seller warns him that it is not allowed changing the internal settings as it may lead to inevitable damage of processor, motherboard and other awful events. Such statements are signs of incompetence as the manufacturers of motherboards often indicate the possibility of overclocking.
Another problem for inexperienced user is buying of rather cheap components in the hope to overclock them to their more expensive analogs. In this case, it is necessary to know what to buy and hoe to choose these components; otherwise you risk of buying cheap and low-powered and absolutely unoverclocked machine.