From the XFX website for North America and the 7**** series:
WARRANTY INFORMATION
Protect Your Card-And Its Next Owner-With XFX's Breakthrough Double Lifetime Warranty
Introducing the XFX Double Lifetime Warranty.
What does it mean for you?
Simple: Protection.
What does it mean for your card's next owner?*
Easy: Protection.
Here's the deal: We will repair and service your 6-Series or 7-Series Graphics Card for as long as you own it. All you have to do is register the card with us online. And, should you sell or transfer the card, we'll honor the warranty for the card's second owner, too, as long as they register it with us online. You get protection AND the added value of being able to pass along a full warranty with the card should you sell or otherwise transfer it. Now that's a Double Lifetime Warranty!
*Based on online registration. Warranty applies regardless of whether the card has been transferred or sold, or previously repaired or replaced by XFX.