I have an overclocked i5 and a AMD 7950, both of which draw a decent amount of power. I was only able to max it out at like 250 watts intake. However, my power supply may have been defective so we will see what the new one says haha. I would agree, a powersupply upgrade should be in your future, but basic wise it might be fine. It also depends on how many expansion cards, case fans, and hard drives you're also running.