According to the latest information AMD Radeon R9 280X and 270X are both rebrands of Tahiti-based graphics cards.
AMD Radeon R9 280X with TAHITI XT
Starting from Radeon R9 280X, apparently this is a pure HD 7970 GHz Edition refresh, only with slower clocks. What is interesting is that both R9 280X and HD 7970 GHz Edition will be priced similar, around £230 ($299). The R9 280X will make use of full Tahiti XT GPU with 2048 cores, 128 texture units and 32 ROPs. Of course there’s 3GB GDDR5 384-bit memory on board. This card will be available starting from late October.
AMD Radeon R9 270X with TAHITI LE or PITCAIRN?
The R9 270X is not exactly a pure refresh of Radeon HD 7950. In fact it only has 256-bit bus, which is less than original 384-bit width. What it means is that 270X is a cut-down version of Tahiti PRO, whereas the R9 280 will feature a full TAHITI PRO processor (pure HD 7950 re-boxing), but this is yet to be confirmed (this is just my theory for now). There are only two options here, either Gibbo is right and this is Tahiti with 256-bit interface (supposedly TAHITI LE), or this is just Curacao aka Pitcairn.
Anyway this where it all came from, the OCUK admin, Gibbo:
Also those are you thinking about the new cards, well this is what is happening:-
R270 is HD 7950 re-boxed and these shall be reference design in beginning and prices from £170 region, so same as our lowest price 7950’s. So OcUK is already at the new price, the newly boxed R270’s will arrive middle-end October.
R280X is the HD 7970 GHz re-boxed and these shall be reference design in beginning and prices shall be around £230 region, so same again as our lowest priced 7970’s. This makes our current Asus 7970’s a bargain as they are TOP and Platinum cards, the equivalent of these in R280 X shall be in the £250-£300 region and available in their R280 X packaging around end of October.
R290 X unfortunately I cannot release pricing or specification info yet, but price wise its similar to GTX 780 but slightly faster, right now, of course AMD could change the launch price at any time. :)
I’ve checked my details more closesly:-
R270X is a cripped HD 7950, 2GB and 256-bit reduced from 3GB and 384-Bit. R270X will be £155-£175, whereas were selling the faster HD 7950 for £170ish, they should be £200+ and are now EOL, so a deal whilst they last. When they are gone, that is it just like the 670 deals. Don’t miss out. Think HD 7950 GPU on a 7870 PCB/RAM config.
R280X is a HD 7970 equivalent, a little slower than a GHz model, pricing around £229-£249, so again our HD 7970 deals are excellent as they are super overclock uprated models for a similar price, again these should be £300+ and are also EOL, once gone that is it. This is a HD 7970 re-boxed/re-branded.
R290 and R290X are the only cards faster than a HD 7970GHz by quite a bit. But HD 7990 is still performance King and at our current prices is also cheaper than an R290 X. :)
|AMD Radeon 200 series “Volcanic Islands” (Update 9.27)|
|Graphics Card Model||Processor||Rebrand of|
|AMD Radeon R9 290X||Hawaii XT||— new —|
|AMD Radeon R9 290||Hawaii PRO||— new —|
|AMD Radeon R9 280X||Tahiti XT||HD 7970 GE (Tahiti XT2)|
|AMD Radeon R9 280||Tahiti PRO||HD 7950 (Tahiti PRO)|
|AMD Radeon R9 270X||Tahiti LE or Curacao XT||HD 7870 (Tahiti LE or Curacao XT)|
|AMD Radeon R9 270||Curacao PRO||HD 7850 (Pitcairn XT)|
|AMD Radeon R7 260X||Bonaire XTX||HD 7790 (Bonaire)|
|AMD Radeon R7 260||Cape Verde PRX||HD 7770 (Cape Verde)|
|AMD Radeon R7 250||Oland XT||HD 8670 OEM (Oland)|
|AMD Radeon R7 240||Oland PRO||HD 8570 OEM (Oland)|