Im 95% confident that your power supply will run everything. You will need 2 free power plugs to power the card and pay attention to the package contents of the card. Most cards come with an adapter to convert a standard 4 pin molex into the 6 pin pci express connection that will be needed to power the card. Heres an example of what im talking about. Now, you just might be fortunate enough to have a power supply with a 6 pin connection already on it, you can easily remove the side panel and find out for sure.

