Upgrading power supply is always safe as long as it is a good brand power supply. This is where more information from you is needed. Is your computer custom built or is it the default power supply of a boxed system. A 250 watt power supply is insufficient for any computer that is decent and built within the last few years. The age of your computer and the power of your system has slot to do with how much power you need. If you are running a computer made in 2002 or before, I can see where you can get away with a 250 watt power supply. Anything built after that needs something more powerful, otherwise you risk power supply failure. If however you are running an older model boxed computer with its default power supply and it has worked fine all this time, why upgrade the power supply unless you plan on upgrading the whole system? If your computer is custom built, we need information on the specs of your system: Model and number designations of your processor, video card, and how many cd drives you have. Your motherboard manufacturer may or may not have a minimum standard on the wattage you need. I suspect your power supply is running hot if your system is custom. Whether you need 400 or bigger depends on your system components.
Edited by squall_1981, 01 June 2007 - 04:53 AM.