R9 270X is supposed to be sub $200 and R7 260X is supposed to be sub $150...
R9 280X = $299
R9 270X = $199
R7 260X = $139
The upcoming generation of products will be branded R7 and R9. R7 will be AMD’s lower-end mainstream parts, while R9 will be for their higher-end enthusiast parts.
Notably, AMD is taking care to note that certain features are only available on certain cards. The R9 series is Direct3D 11.2 compliant, for example, but the R7 was not mentioned as being so. Meanwhile R7 260X, R9 290, and R9 290X will have new audio features (more on that later), but not R9 270X or R9 280X. So it’s likely that some of the chips in this stack are rebadged/rebranded Southern Islands (7000 series) parts, though it’s not clear which are what.
Below the 290X will be the R9 280X. This will be a card with 3GB of RAM, and it has a price tag of $299. It’s not clear whether this is the same GPU as in 290X or not, and in lieu of specs AMD has given us a single benchmark: 3DMark Firemark, where it scores better than 6800.
Further down yet is the R9 270X. This is a 2GB card with a $199 price tag. AMD is listing a Firestrike score of greater than 5500.
Finally, at the bottom of the stack are the R7 parts, R7 260X and R7 250. 260X is a 2GB card for $139, with a Firestrike score of over 3700. Meanwhile 250 is AMD’s sub-$100 card, hitting retail at $89 with 1GB of RAM and a Firestrike score of over 2000.
PCGH has the stack different , with Curacao replacing Cape verde instead of Pitcairn
What's weird is that on Wall street journal the R9-290 is supposedly announced
R9 290X, R9 290, R9 280X, R9 270X, R7 260X and R7 250
The Radeon R7 250 which will cost $99 is based on Oland GPU. This is an entry-level model which won’t support the new TrueAudio technology.
The Radeon R7 260X is the first card to support TrueAudio. The R7 260X is based on Bonaire GPU, this is a HD 7730 rebrand which was launched earlier this year. These cards will cost starting from $139.
Moving on to R9 270X with Curacao GPU we have a price tag of $199 and at least 2GB GDDR5 memory. The R9 270X is a direct rebrand of the HD 7870.
The Radeon R9 280X is Tahiti XT based model. This card, just as 270X, won’t support TrueAudio (that’s because Tahiti is 2y old). The price tag is $299, meaning it will replace HD 7970 GHz Edition which is currently available for this price.
AMD Radeon R9 280X
The AMD Radeon R9 280X is based on the Tahiti XT architecture featuring 2048 Stream processors and scores 6000 points in 3DMark Firestrike performance mode. The Radeon R9 290X would be available for $299 in the next couple of weeks and is remarkable that Tahiti is now available for such a low price while it was the flagship GPU of the last generation Radeon Family.
AMD Radeon R9 270X
The AMD Radeon R9 270X is based on the latest Curacao XT GPU while its younger brother, the R9 270 is based on the Curacao Pro chip. The Curacao Pro ended up faster than the Radeon HD 7870 in a previous performance overview so its easy to say that the Curacao XT based R9 270X would be much faster and trade blows with the Radeon HD 7950. The GPU would feature 2 GB GDDR5 memory and a price of $199 while the Curacao Pro model would be available for $179 US.
AMD Radeon R9 260X
The AMD Radeon R7 260X is a single variant that is based upon the Bonaire XTX chip which is a faster version of the Bonaire core that was feature on the Radeon HD 7790. The GPU has a performance score of around 4000 marks in Firestrike in performance mode and would be available in 2 GB models for $139 US at launch.
seems R9 270X is supposed to be on par with HD7950 (maybe stock vs stock) and R7 260X aupposedly comes with AMD TrueAudioEdited by AlphaC - 9/25/13 at 2:45pm