Calling EVGA tech is damn painless. I had a brand new 560ti die on me right from the store, they gave me an RMA number and a phone number. Told me to go back to the store for an exchange, and have the reseller call the number. It was an authorization on EVGA's behalf to jump the card up from a stock 560ti to their 560ti superclocked with backplate. Roughly an extra $50 on the card.
But before you go calling EVGA, pull and reseat the card. I've run across a few times where even bumping the card while seated will cause poor contact with the card and the PCI-E slot. But 500/501 errors can mean a whole lot of nothing. Or a whole lot of something, thats the real problem with them.
-- "For every human problem, there is a neat, simple solution; and it is always wrong." --H.L. Mencken