Not the best, but it will work. If you already have the PSU it will work fine, but if you don't I would spend a few bucks more and pick up a XFX PRO 550W.
Video Card:Gigabyte Radeon R9 280 3GB WINDFORCE Video Card ($179.99 @ Newegg) Total: $179.99 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2014-12-24 02:00 EST-0500
Make sure your 500w psu is actually decent and not a fire hazard.
Not the best, but it will work. If you already have the PSU it will work fine, but if you don't I would spend a few bucks more and pick up a XFX PRO 550W.