you will be fine, at peak you won't break 475w total system power and you have a quality PSU. the tests where run with an OC Q6600 CPU.
Test System Specs & 3Dmark Vantage
Test System Specs: Hardware
- Intel Core 2 Quad Q6600 @ 3.00GHz (LGA775)
- x2 Kingston HyperX 2GB PC2-8500 Module(s)
- ASUS P5E3 Premium (Intel X48)
- OCZ GameXStream (700 watt)http://static.techspot.com/articles-info/113/bench/Power.png