On September 25th, AMD will be hosting a live stream event to announce their new GPU though probably won't be officially released until sometime in October. The event will also feature Battlefield 4, though personally I couldn't care less about BF4 but some of you might.
It is said that it will be competing with the Titan, and there are some unconfirmed benchmarks that show it is faster than the Titan.
Links:
http://www.brightsideofnews.com/news/2013/8/7/amd-to-launch-gpu-codenamed-hawaii-in-hawaii-sept-25.aspx
http://semiaccurate.com/2013/08/07/amd-to-launch-hawaii-in-hawaii/
http://www.techoftomorrow.com/2013/pc/amd-releasing-new-flagship-gpu-codenamed-hawaii-on-september-25th/