Originally Posted by Offler
I have to agree with bencher. 7970 GE has Tahiti XT2, while previous cards had Tahiti XT. This is far from rebranding. The card was still sold as HD 7970 with higher clocks.
Also even when Tahiti XT and XT2 dont vary in design (exactly same core), XT2 was a result of cooperation between AMD and TSMC. They refined manufacturing process in order to improve Tahiti's thermal and electrical atrributes - thus allowing higher stock clocks.
Its like comparing Q9550 and Q9550s. the S version had lower stock voltages, lower TDP. That allowed power saving or higher overclock as in case of standard Q9550... Two different products, althought based on same core.
Rebranding HD 7970 to HD 8970 was idea of computer manufactures such as Dell. In this case you have two cards, with different stickers, but its exactly same product. Not the case of 7970 and 7970GE...
that's great about the Q9550, but the 7970 ghz has no lower TDP or voltage. it was supposed to, or those were the circulating rumors, but it didn't pan out. in launch reviews it oc worse than the regular 7970 at most sites too. that's something you never forget.
AMD acknowledges that the Tahiti GPU itself is exactly the same. If you want the skinny on that, feel free to reference back to our Radeon HD 7970 launch coverage. Everyone else, let’s move on to a deeper analysis of PowerTune with Boost.
Unlike what previous reports from various sources in the media have been suggesting, the HD 7970 GHz Edition is not based on a new ASIC, or even a new revision of the existing "Tahiti" one. Instead, it is made from hand-picked (binned) high-performing Tahiti chips, from existing batches.
AMD launched the Radeon HD 7970 Ghz Edition today. Basically just a rebrand of the Radeon HD 7970, that was introduced on January 10, the new cards run at 1 GHz core clock with a boost up to 1.05 GHz, and a memory clock of 1.5 GHz (6 GHz effective). AMD say this is the fastest single-GPU card on the market today.
The basic specs, other than clock speeds, are the same as for the original HD 7970, which means they probably use the same PCB (good news for customers who use 3rd party coolers), which is no big surprise. The rebrand was made possible by improved yields with more high performing die at lower voltages.
HD 7970 however is a potent graphics card with a lot of reserve, AMD today is releasing the GHz model of the 7970 card. Pretty much AMD is binning the Tahiti XT GPUs and the "better" batches are now labeled as Tahiti XT2.
at best we have better yields which happens with every chip ever. nothing new here and AMD admitted as much. even though we found out the better voltage tolerance and oc headroom was crap as well when people bought them.
I have to side with AMD on this one. AMD gives different code names to the same exact chip because the codenames only really correspond to potential card launches. Pitcairn XT becomes Curaco XT. done with this subject. it's clear as day and there is no point in continuing.