Your PSU has 30A available according to the specs , there is no need to upgrade. You'd need to buy something like a 900 Watt generic jobby to meet that kind of power outputmy x1800xt that i got today is running ok on my enermax liberty 400w psu, but will get a more powerful one soon, its ok for now but my psu's life may shorten cos of it and i'd rather not have it failing on me.
