this is kind of a silly question, but i have to ask, on the back of my atx case the power supply-there's a switch that says 115 volts and 230 volts; what is that suppose to do? or what are u suppose to leave it on? 115 or 230???
That switch is there so you can set your PS to local electrical supply conditions. In the US we supply @ 110v 60HZ. Other places in the world may operate @ 220v. If you are in the US it should be set @ 115 on consumer electronics.In the US 220v is used primarily for high draw home appliances (washers, dryers, electric ranges, water heaters)and heavy duty machinery. Not only that but you can't plug 110v connector into 220v connector or vice-versa; different connector configuration. Wanna see the difference, just unplug a washer or dryer and look at the plug.