According to Videocardz the newest member of the Radeon 300 series is not a simple rebadge of an elderly card.

Antigua is a new codename for the Tonga processor. The PC world hasn't seen a full Tonga GPU before although for some reason the GPU configuration was previously featured in some Apple iMac models under the descriptive title R9 M295X (codenamed Amethyst).

The Radeon R9 380X will feature 2048 Stream Processors, 4GB GDDR5 memory and 256-bit interface. Earlier reports suggesting that full Tonga GPU could actually have 384-bit bus were most likely pants.

The reference clock speeds were not yet confirmed, but the card is expected to run at 1000+ MHz frequency.

The NDA on the specs will lift on 15 November, whereas the embargo date for custom models will end 4 days later on 19 November. XFX, Sapphire, Gigabyte and PowerColor apparently have their cards ready.

Videocardz has compared the imminent AMD Radeon R9 380X to the Mac-only R9 M295X, the R9 380 and the R9 285 with this graphic which we borrowed.

 The yet to be 'confirmed' specs are highlighted in yellow. Pricing at launch is expected to be around $250. While AMD launches this product on the 15th, partner cards are said to be lined up for a 19th November launch.