That Switch on Power Supplies

On the back of most power supplies is a switch with two settings: 115V and 230V. If you are in the United States, you will want to have it at 115V, in Europe, at 230V.

If the proper setting for you is 115V and you set it to 230V, the PC won’t work but it won’t be deadly for your power supply. If you need it to be at 230V and you set it to 115V, you may blow up your computer.