I currently have the Gigabyte DS3 motherboard along with an E6300, 2GB RAM, 1 fan and an arctic cooler 7 CPU fan. My current PSU is a 430W Antec that came with the case when I bought it a couple of years ago. I want to upgrade my graphics card to a 4850 (currently it's a 7900GS) and I'm wondering if this PSU would be enough or I'd be better off getting a better one?