Originally posted by akasixcon
What happens if I don't change my power supply? What bad things can happen? What good things can happen if I upgrade?
If you run a system with an underrated PSU, many things can happen. For starters, the computer might refuse to be turned on. If that doesn't happen, then you may get random crashes and reboots because of insufficient power. In the worst scenario, the PSU can overload, burn and damage another component of your computer in the process.
If you upgrade, you should in principle get rid of stability problems. Also, if you pick a reliable brand, you'll minimize the chance of your PSU blowing up and damaging your computer.