- Jul 4, 2005
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Fudzilla Link
That is why R680 makes sense
It looks like ATI wants to go multi core and this time it can put more smaller cores on a single chip. You can expect that the high-end R700 might end up with more than four smaller cores that will shape up this card.
This is why R680, Radeon 3870 X2 is extremely important for ATI?s future, as it looks like that the future is really multicore. We still don?t know if G100 uses the same approach, but we would not be surprised.
R700XT, the high-end version of the chip will use four or more smaller cores to reach the performance crown and, in this case, you need an excellent Crossfire, multichip driver.
R680 is actually a warm-up product, as ATI will test the Crossfire X with two, three and four cores, and this will give them predictions about the future. R700 is still scheduled for middle of 2008.
______________
Radeon 3870X2 uses Alternate Frame Rendering
If you wondered how CrossfireX works, now we have an answer for you. We asked few AMD product managers and they confirmed that 3870 X2 dual RV670 card or Crossfire with four 38x0 cards works with the help of Alternate Frames Rendering magic.
Alternate frame rendering is quite simple model, where the first chip renders the first frame, the second chip renders the second one and so on.
If you have as many as four cards, each card will render two images, something like card one renders the first and forth while card two renders the second and fifth frame, the third card renders the third and sixth frame and so on.
This should give AMD better performance and leaves space for eight way crossfire. In 3Dmark06 debugging mode we had a chance to see that four cards are rendering eight images virtually at the same time.
_______________
R700 is a 45 nanometre chip
AMD and ATI to go for it
Nvidia just went for 65 nanometre, ATI is at 55 nanometre and it looks like the R700 might be the world?s first 45 nanometre graphics chip.
A 45 nanometre chip is at least 30 percent smaller than 55nm and its more than 50 percent smaller than 65 nanometre chip and at the same time this means that it will be way cooler than any 65 or 55 nanometre chip.
This also means lower heat dissipation and higher clock speeds, but we still don?t know G100 can be the same deal and it can be made of many smaller cores as well. This is how it is possible to put just a bit less than 300 million transistors on a 72 sq mm die.
________________
R700 mini core is 72 sq mm
R700 looks like an interesting chip as it will change a lot of things. Nvidia currently talk about clusters but most of these chips are blocks of functional units divided in these so called clusters.
ATI will do a step forward and will introduce its mini core that will be one small part of a larger chip. ATI can use just one R700 core to get an entry level chip, two cores will make a mainstream card and four R700 cores should take care of the high end.
A single R700 core has just below 300 million transistors and you can do the math that even four R700 cores means over a billion transistors and a lot of graphics processing power.
_________________
High end R700XT has four+ mini cores
Four+ times R700
From what we´ve seen, the R700 is a small single core and if you want a high end you will have to put more of these together.
With lower dissipation and 45 nanometer it will be possible to have four, or even six, smaller cores. The R700 single core will be similar to what we seen in the guise of the RV670, but it is still too early to have too many details.
The new chip will support DirectX 10.1 and Shader model 4.1, among other things. Imagine a chip that can have three or even more times performance of RV670, and this might give you a glimpse of what is coming.
__________________
R700 to carry Radeon HD 4000 name
A whole new thing
There is a big chance that the R700 generation will carry the Radeon HD 4000 generation name, but there is also a chance that ATI will lose the HD prefix or completely change the name.
Since the 3870 is already out, the new R700 marchitecture at 45 nm would deserve a much higher number, and that is likely to happen. It is still too early for a final conclusion, as ATI likes to play around with the names; but at least there is a big change.
AMD internally toyed with that name, but they did the same with Radeon 2950 as a possible name for RV670. Radeon HD 4x00 sounds quite nice, doesn't it?
___________________
R700XT to touch 2 Teraflops
4X theoretical performance of RV670
The next generation of ATI´s latest greatest multi core chip has a chance to be close to or to even break the 2 teraflop mark.
The RV670XT is close to 500 gigaflops, while R700XT might even get as fast as 1.9 teraflops, if not even more. Depending on the final clock the new card might even do 2 Teraflops, and this will certainly speed up games or GPGPU calculations, up to four times.
Imagine if you put two of these in Crossfire, you might even get to 4 Teraflops; but now we are really pushing it.
____________________
R700 is a low, mid and high-end chip
Mini cores
There won't be any RV chips anymore, as the entire R7x0 generation is now based on the R700 mini core. It is quite simple, a single core on a single die is low-end, two cores on a single die is mid-range, while four or more cores on a single die is high-end.
ATI will have to put these R700 cores together and we still don't know how they are going to make the chips "talk" to each other; but it will use the same architecture chip but multiplied in the mid and high-end market.
Sounds interesting doesn't it ? It also explains why ATI is pushing so hard for a Quad CrossfireX driver.
_____________________
Tech Report Article
Modern graphics processors rely on extensive amounts of parallelism to get calculations done as quickly as possible, but those GPUs are still monolithic chips designed with a given number of stream processors, texture units, render back-ends, and the like, each depending on their performance grade. However, the folks at Fudzilla say they have it on good authority that AMD will challenge that paradigm with its next-generation graphics processor, code-named R700. According to Fudzilla, low-end, mid-range, and high-end R700 cards will all have GPUs with varying numbers of identical R700 cores. To determine speed grades, AMD will simply outfit higher-end cards with more R700 cores.
AMD's top-of-the-line R700 product, for instance, will supposedly have four or more R700 cores in one die and will be able to crunch nearly two trillion floating point operations per second, or teraFLOPS. By contrast, Fudzilla explains that the existing Radeon HD 3870 is in the 500 gigaFLOPS range. FLOPS don't tell the whole story, of course, but high-end R700 cards will be an order of magnitude faster than existing products if those numbers are even remotely accurate.
Interestingly, this rumor sounds similar to information that recently seeped out about Intel's Larrabee project. Larrabee is expected to be a discrete, game-worthy Intel graphics processor scheduled for the not-too-distant future, and an Intel presentation nabbed by Beyond3D in April suggests Larrabee products will be based on multiple, small "throughput cores." A diagram showed a chip based on ten of those cores with a shared pool of 4MB of cache.
That is why R680 makes sense
It looks like ATI wants to go multi core and this time it can put more smaller cores on a single chip. You can expect that the high-end R700 might end up with more than four smaller cores that will shape up this card.
This is why R680, Radeon 3870 X2 is extremely important for ATI?s future, as it looks like that the future is really multicore. We still don?t know if G100 uses the same approach, but we would not be surprised.
R700XT, the high-end version of the chip will use four or more smaller cores to reach the performance crown and, in this case, you need an excellent Crossfire, multichip driver.
R680 is actually a warm-up product, as ATI will test the Crossfire X with two, three and four cores, and this will give them predictions about the future. R700 is still scheduled for middle of 2008.
______________
Radeon 3870X2 uses Alternate Frame Rendering
If you wondered how CrossfireX works, now we have an answer for you. We asked few AMD product managers and they confirmed that 3870 X2 dual RV670 card or Crossfire with four 38x0 cards works with the help of Alternate Frames Rendering magic.
Alternate frame rendering is quite simple model, where the first chip renders the first frame, the second chip renders the second one and so on.
If you have as many as four cards, each card will render two images, something like card one renders the first and forth while card two renders the second and fifth frame, the third card renders the third and sixth frame and so on.
This should give AMD better performance and leaves space for eight way crossfire. In 3Dmark06 debugging mode we had a chance to see that four cards are rendering eight images virtually at the same time.
_______________
R700 is a 45 nanometre chip
AMD and ATI to go for it
Nvidia just went for 65 nanometre, ATI is at 55 nanometre and it looks like the R700 might be the world?s first 45 nanometre graphics chip.
A 45 nanometre chip is at least 30 percent smaller than 55nm and its more than 50 percent smaller than 65 nanometre chip and at the same time this means that it will be way cooler than any 65 or 55 nanometre chip.
This also means lower heat dissipation and higher clock speeds, but we still don?t know G100 can be the same deal and it can be made of many smaller cores as well. This is how it is possible to put just a bit less than 300 million transistors on a 72 sq mm die.
________________
R700 mini core is 72 sq mm
R700 looks like an interesting chip as it will change a lot of things. Nvidia currently talk about clusters but most of these chips are blocks of functional units divided in these so called clusters.
ATI will do a step forward and will introduce its mini core that will be one small part of a larger chip. ATI can use just one R700 core to get an entry level chip, two cores will make a mainstream card and four R700 cores should take care of the high end.
A single R700 core has just below 300 million transistors and you can do the math that even four R700 cores means over a billion transistors and a lot of graphics processing power.
_________________
High end R700XT has four+ mini cores
Four+ times R700
From what we´ve seen, the R700 is a small single core and if you want a high end you will have to put more of these together.
With lower dissipation and 45 nanometer it will be possible to have four, or even six, smaller cores. The R700 single core will be similar to what we seen in the guise of the RV670, but it is still too early to have too many details.
The new chip will support DirectX 10.1 and Shader model 4.1, among other things. Imagine a chip that can have three or even more times performance of RV670, and this might give you a glimpse of what is coming.
__________________
R700 to carry Radeon HD 4000 name
A whole new thing
There is a big chance that the R700 generation will carry the Radeon HD 4000 generation name, but there is also a chance that ATI will lose the HD prefix or completely change the name.
Since the 3870 is already out, the new R700 marchitecture at 45 nm would deserve a much higher number, and that is likely to happen. It is still too early for a final conclusion, as ATI likes to play around with the names; but at least there is a big change.
AMD internally toyed with that name, but they did the same with Radeon 2950 as a possible name for RV670. Radeon HD 4x00 sounds quite nice, doesn't it?
___________________
R700XT to touch 2 Teraflops
4X theoretical performance of RV670
The next generation of ATI´s latest greatest multi core chip has a chance to be close to or to even break the 2 teraflop mark.
The RV670XT is close to 500 gigaflops, while R700XT might even get as fast as 1.9 teraflops, if not even more. Depending on the final clock the new card might even do 2 Teraflops, and this will certainly speed up games or GPGPU calculations, up to four times.
Imagine if you put two of these in Crossfire, you might even get to 4 Teraflops; but now we are really pushing it.
____________________
R700 is a low, mid and high-end chip
Mini cores
There won't be any RV chips anymore, as the entire R7x0 generation is now based on the R700 mini core. It is quite simple, a single core on a single die is low-end, two cores on a single die is mid-range, while four or more cores on a single die is high-end.
ATI will have to put these R700 cores together and we still don't know how they are going to make the chips "talk" to each other; but it will use the same architecture chip but multiplied in the mid and high-end market.
Sounds interesting doesn't it ? It also explains why ATI is pushing so hard for a Quad CrossfireX driver.
_____________________
Tech Report Article
Modern graphics processors rely on extensive amounts of parallelism to get calculations done as quickly as possible, but those GPUs are still monolithic chips designed with a given number of stream processors, texture units, render back-ends, and the like, each depending on their performance grade. However, the folks at Fudzilla say they have it on good authority that AMD will challenge that paradigm with its next-generation graphics processor, code-named R700. According to Fudzilla, low-end, mid-range, and high-end R700 cards will all have GPUs with varying numbers of identical R700 cores. To determine speed grades, AMD will simply outfit higher-end cards with more R700 cores.
AMD's top-of-the-line R700 product, for instance, will supposedly have four or more R700 cores in one die and will be able to crunch nearly two trillion floating point operations per second, or teraFLOPS. By contrast, Fudzilla explains that the existing Radeon HD 3870 is in the 500 gigaFLOPS range. FLOPS don't tell the whole story, of course, but high-end R700 cards will be an order of magnitude faster than existing products if those numbers are even remotely accurate.
Interestingly, this rumor sounds similar to information that recently seeped out about Intel's Larrabee project. Larrabee is expected to be a discrete, game-worthy Intel graphics processor scheduled for the not-too-distant future, and an Intel presentation nabbed by Beyond3D in April suggests Larrabee products will be based on multiple, small "throughput cores." A diagram showed a chip based on ten of those cores with a shared pool of 4MB of cache.
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