"Unless you are running multiple video cards and a beefy processor, you won't have any use for a monster 1KW+ PSU. Even relatively powerful hardware doesn't come close to using the kind of power that super high-end units provide. Today we will be taking a look at a "mainstream" power supply from FSP Group, the Aurum Gold 500. The Aurum is a 500 watt non-modular power supply that features 80+ Gold certification and dual 12v rails. The 500w model is one of four in the Aurum series; other models include a 400w variety and beefier 600w and 700w units."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips