According to HardwareCanucks XFX is to discontinue double lifetime warranty for new Radeon cards.

techPowerUP:With the introduction of its Radeon HD 7970 graphics cards, XFX silently discontinued its famous “double-lifetime” product warranty policy, which made XFX graphics cards a worthy buy for overclockers. This warranty policy also added to the resale value of these cards. It allowed buyers to tamper with the supplied cooling solution (heatsink), by replacing them with their own without voiding warranty, it even gave lifetime warranty coverage to the original buyer, as well as to the person buying the product pre-used from an original buyer.

XFX told HardwareCanucks that their Double Lifetime warranty just wasn’t sustainable and so they decided against offering it on HD 7900-series cards. This is what the warranty policies of XFX’ HD 7900 graphics cards look like:

• Cards with Double Dissipation (Double D) or whose product number ends in “R” get Lifetime warranty if registered within 30 days.
• All other cards (ex: HD 7970 Core Edition; FX797ATNFC) get 2 Year Warranty

• READ MORE (Source): XFX Discontinues Double Lifetime Warranty with New Radeon Graphics Cards | techPowerUp