German tech site HT4U claims AMD will release a new Radeon HD 7800 series graphics card in mid-November. The site says the new model will bridge the gap between the Radeon HD 7870 and the Radeon HD 7950, it will feature a Tahiti LE GPU, a slower version of the Radeon HD 7950.
In the past AMD had a Radeon HD 4830/5830/6930, but the site's sources reveal the card is unlikely to be launched as a Radeon HD 7930. It's said to be classified as a Radeon HD 7800 series model, and HT4U speculates it could be something along the lines of "Radeon HD 7870 Boost Edition".
If the story is true, we'll find out in a week or two.