There's actually an auxiliary ATX 4 pin connector that might be on your current PSU. Modern CPUs need more juice so they have extra specialized power connections other than the main 24-pin ATX connector.
If you want to look at a beefier PSU , get an ATX 2.0 model that already has all those extra connectors as well as PCI-E connectors in case you ever need a higher-end PCI-E video card.
You can usually find the Antec NeoHE 550w on sale for something like 50% off it's $100 MSRP if you look around. Fortron also has some decent quality units in the $50-$75 price bracket.
www.jonnyguru.com/ has detailed PSU reviews. I'd feel pretty comfortable with any unit he gives an 8+ point review on.
If you want to look at a beefier PSU , get an ATX 2.0 model that already has all those extra connectors as well as PCI-E connectors in case you ever need a higher-end PCI-E video card.
You can usually find the Antec NeoHE 550w on sale for something like 50% off it's $100 MSRP if you look around. Fortron also has some decent quality units in the $50-$75 price bracket.
www.jonnyguru.com/ has detailed PSU reviews. I'd feel pretty comfortable with any unit he gives an 8+ point review on.