Cooler Master iGreen Power 600W PSU
 

There are a few main factors that make a power supply a heavy weight contender. For most of us price is number one, and this PSU is affordable. Wattage is another very important factor and considering its 82% efficient at 600 watts, that's covered. It also comes with lots of sleeved leads to fit most motherboards, it meets the newest ATX 12V & SSI standards, and is Active PFC