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[EXP] AMD RV775 Ready to Give Nvidia a Punch

post #1 of 66
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Quote:
We have unveiled lots of details of NVIDIA new-line products (GeForce GTX260, GTX285, GTX295) expected to be out next year. Of course AMD wouldn’t keep quiet always. It has been nearly half a year since RV770 was launched in June. Some websites have reported that AMD will bring out something new - 55nm RV790 (960SP) for transition between 55nm RV770 and 40nm RV870. Is that true?

Couple of days ago we got an email from a mysterious friend from US who would like to leak something new just because he likes our style. We need to keep his name condential, but we’d love to share all the information we’ve got. We won’t make use of this to do any evil things. Considering AMD ever purposely leaked some confusing news about RV770, the following data remains to be confirmed





According to our source, the stream processors of RV775 will be increased to 840, and TMU increased to 48. It can be concluded that RV775 will feature 168 Stream Processing Units, and every 14 of Stream Processing Units forms a SIMD, so there would be 12 SIMD in total. Every SIMD contains 70 stream processors, which sounds more logical.

But how can this be done? It’s very likely that they have utilized the spare units of RV770, and reform the Stream Processing Units in some special way. AMD RV770 is designed based on repair structures technology. If you have a unit with 10 shader processors, actually build 11. In this way, the spare unit can work should there be a defect. (You could visit Anandtech for more details) During the time when RV770 is sold well, AMD has enough time to improve the rate of good product. But we have no idea about the decrease of transistors.

Basically, the increase of Stream Processors and TMUs would bring positive influence. The improvement of core clock is supposed to be great as well. The core clock of RV775XT goes up sharply from 750MHz (HD4870) to 900MHz, and the memory clock of GDDR5 gets up to 1400MHz(*4). The core clock of RV775Pro has also been upgraded to 725MHz, and memory clock updates to 1400MHz. RV775Pro might be using GDDR4.

Apparently, RV775XT is designed to fight GeForce GTX285 and put NVIDIA into a difficult situation. The informer doesn’t mention 1GB version, but it won’t be a big problem to add another 512MB GDDR5. (it rumors that AMD has ordered all GDDR5 chips that a memory manucturer produces in Q1 and Q2 next year). Probably RV775XT will be branded as Radeon HD5870. Real products are expected to be available late January, just after the new version of GTX200 Series.

AMD will launch RV775Pro in March 2009, while RV870 based on 40nm won’t be out before October 2009. No news indicates AMD will design single-card and dual-core products again, but why not?


Source
post #2 of 66
woah 900Mhz stock clock?w00t maybe we can get a stock 1Ghz card
840 shaders looks a bit out of place it should look kinda like this-




    
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post #3 of 66
looks promising, but it doesnt seem like such a performance increase to brand it as 5870, as the article said.
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post #4 of 66
more cores
more texturers
less transistors, smaller die size

what in the hell could they have removed from it??
    
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post #5 of 66
Sweet
    
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post #6 of 66
This should be the 4890 and 4860 respectively or just rebrand them to a lower end 58-- series card.
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post #7 of 66
But this is definitely sweet news. I was thinking all these days that nvidia might after all take the performance crown back. I guess AMD have other ideas. Way to go AMD if the report is true.

And finally when the dust settles, we win.
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post #8 of 66
Quote:
Originally Posted by dark_eternal_knight View Post
more cores
more texturers
less transistors, smaller die size

what in the hell could they have removed from it??
Just what I thought!! I reckon 4890 suits it better although I'm not entirely convinced about the whole story.

I read a several (5+) page article last week on how it took ATI 5 years to design, develop and produce the RV770, how are they gonna change the core so dramatically in months just to put Nvidia down for a product that is going to only just beat the 4870X2....

Anyway if I am wrong, and I do hope I am, it will be great to see an even more powerfull X2
post #9 of 66
Looks good except for the 512mb memory size.
post #10 of 66
sweet...

dunno if they will warrant the upgrade or not, but hey... time will tell. nice to see AMD kicking butt now.
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