Save electricity, reduce noise and heat

We don't usually think of desktop computers as power hogs, but they can be.  A PC with an older and less efficient power supply can add $10 to $25 to your monthly electric bill, more if it runs 24/7 like mine.  A few months ago I upgraded the power supply in my primary desktop PC to an Antec earthwatt model.  My monthly electric bill has dropped about $15 and the power supply is much quieter than my old one.  It also generates noticeably less heat. 

NewEgg has the Antec 500 watt earthwatts EA500 on sale for $54.99 with free shipping.  This power supply has enough capacity for a desktop system with multiple drives and a high-end graphics card.