According to a report from DigiTimes' sources in the "upstream supply chain," AMD will launch its next generation high-end "Hawaii" GPU in October with Asus, MSI and PowerColor expected to start mass shipments of "related products" in the same month.
Though we don't usually attach much weight to rumors of future product releases, we're strongly inclined to consider this as credible since AMD has been cutting prices of its Radeon HD 7000 series graphics cards and is hosting a "technical showcase" in Hawaii next month. It's also worth noting that although DigiTimes hasn't specified when in October these new graphics cards will arrive, we're willing to speculate that it will be available during this year's holiday season, and it might even arrive in time for the launch of Battlefield 4 on October 29, 2013.
Aside from previous rumors that the Hawaii GPU would retail at $600 and compete with the Nvidia GTX Titan, there's very little information available about AMD's new top-end GPU; we'll have to wait to see what it has to offer.