This post will be updated once more information will be available.
AMD has announced Radeon R9 285 during 30 Years of Graphics and Gaming Innovation event.
AMD Radeon R9 285
AMD R9 285 is equipped with Tonga PRO GPU, which sports 1792 Stream Processors. Card is equipped with 2 or 4GB GDDR5 memory which is operating at 5.5 GHz. The core clock is set to 918 MHz. The biggest difference between Tonga and Tahiti is the width of memory bus. The R9 285 has only 256b interface, which will surely bottleneck serious UltraHD gaming.
AMD Radeon R9 285 does support DirectX 12 and Mantle.
AMD Radeon R9 285 will be released on September 2nd for $249.
AMD Radeon R9 285X
One month later, AMD will officially introduce Tonga XT variant, which will sport 2048 Stream Cores. The exact specifications were not yet revealed.
|AMD Radeon R9 280 Series|
|Radeon R9 280||Radeon R9 285||Radeon R9 280X||Radeon R9 285X|
|GPU Codename||Tahiti PRO||Tonga PRO||Tahiti XT||Tonga XT|
|Base Clock||827 MHz||-||850 MHz||-|
|Boost Clock||933 MHz||918 MHz||1000 MHz||?|
|Memory Clock||1250 MHz||1375 MHz||1500 MHz||?|
|Memory||3GB GDDR5||2GB/4GB GDDR5||3GB GDDR5||?|
|Bandiwdth||240 GB/s||176 GB/s||288 GB/s||?|
|Connectors||6-pin + 6-pin||6-pin + 6-pin||8-pin + 6-pin||8-pin + 6-pin|
|Launch Date||March 2014||September 2014||October 2013||September 2014|
ASUS Radeon R9 285 STRIX