Upgrading to a higher wattage power supply does not pose a risk of damaging components in a PC. Even if a power supply has a higher capacity, the system will only draw the amount of power it needs. For example, if the total power requirement of the components is 50 W and a 100 W power supply is installed, the PC will still only consume 50 W. There is no waste of power in this scenario; the power supply simply has more capacity than is currently utilized. Overclocking may benefit from a higher wattage supply, but it is not necessary for standard operation.