I've been considering to upgrade my MSI HD 7770 for an R9 290 GPU, but I don't know if my system has enough juice to power the video card. I have an Agile 500Watt Power Supply and it powers my current system without breaking a sweat. Will I be able to use that video card on my computer? Here are the specs of the PSU. http://ada-kom.com/power-supply/tower-chassis/single-power/agile-500w