if you own an EVGA card, then you register it on their site (within 30 days of purchase) and then you can select to step-up within 90 days of purchase date
when you step up, you choose a card you wan't to go up to and then they will contact you with further instructions
it involves shipping your card in for inspection, them shipping the new card after you've paid, you'll have to pay shipping and the difference in price (original of what you bought the card for)