Good news!
4890x2 would beat the gtx 295 easy right? 8-20% improvement on the single card... so?
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Good news!
4890x2 would beat the gtx 295 easy right? 8-20% improvement on the single card... so?
"HD4890" competes GTX260?
I thought HD4870 does that already.
I'd imagine the biggest gain from RV790 is lower power consumption, along with higher clocks - they have been making RV770 55GP with fixed variables now for over 9 months. In the mean time, AMD shorely has tweaked the arch and TSMC has been busy optimizing 55GP to make 55GT. It would be reasonable to expect higher performance and lower power from RV790 @ 55GT, not just one or the other.
hopefully the 5xxx series with new architecture will be out by the end of octuber and be on 40nm
i might just get the x2 verision for know when it releases and then sell it and get 5xxx series
Looks like ATI is going for 2 directions here.
RV740- unprecedented density on 40nm (it's scarily small)
RV790- unprecedented clock scaling on 55nm (if 1Ghz OCs are common and true)
RV870- combining both?
What is bugging me here is that most 4870s and x2s will do 1000-1100 (4-4.4GHz effective) so long as you don't take the core too high and this often yields better performance than a core overclock so why not use higher binned RAM as well as higher binned GPUs?
http://www.fudzilla.com/index.php?op...12439&Itemid=1Quote:
CeBIT 2009: An entirely new chip
We learned some bits and pieces on ATI's upcoming RV790 chip and we can now happily confirm that his is yet another 55nm chip from ATI.
The company didn’t want to postpone the introduction of the new card in performance segment and therefore did it in 55nm, while RV740 remains the first 40nm. RV740 just launched as a mobile chip, and we’ve seen it up and running, while the desktop part should arrive in the next month or two.
The new chip is a new architecture, but with some basic concepts taken from the RV770, that is why the chip will be significantly faster than anything based on the RV770. It is not just a speed bump and a better batch of RV770 based Radeon HD 4870 and 4850 chips, it is a newer and better chip.
It looks like this new chip will beat the GTX 260, and it could even get close to GTX285, but at a much more affordable price.
PcGamesHardware is probably wrong, as it is ALREADY wrong that the 4890 could only compete with the GTX 260, as the 4870 1GB already does that. I was always thinking that with 960 shaders and 48 TMU's, the 4890 would blow the GTX260 out of the water.
gtx 285 at least
gnt
The difference is small, 21 watts at idle and 5 watts at load.
http://techreport.com/articles.x/16504/10
How many different versions of 4890x2 are there going to be?
Just standard and vanilla or will we see 4Gb variants with 2Gb of GDDR5 shared inbetween?
mmmm new architecture :slobber:
Right, it aint no R800 chip! Anyways, I've always thought it had to be slightly different from the RV770 rather than just clock speed changes, since this chip is called the RV790XT. A big hint there, perhaps? I'm thinking that it would actually beat the GTX 280 and perhaps even go head-to-head with the GTX 285 depending on clock speeds. At least ATI will have the fastest dual-chip card for a few months, if there's not too much of a delay...
I wouldnt be surprised if ATI actually had even lower running clocks on the RV790XT, like 725MHz or so. Notice how the 3870 ran at 775MHz and the 4870 runs at only 750MHz?
LOL, didnt know that. I read about this once a while ago, but forgot.. I just thought that with all of the heat and added transistors from a bigger chip, ATI just had a harder time running it at an equally high clock. Remember how the 6800 Ultra ran at only 400MHz compared to the 5800 Ultra at 500 MHz?
well so far amd told everybody to expect a 25% boost?
so then my guess is that it has 25% more shader units?
that would make it a round 1000...
Or 1280 SPs @ a lower clockspeed to conserve power at both idle and load?
Heh, just suggesting.
I hope that there will be a dual OC version.
Will the AMD RV790 Architecture be Something Different?
http://www.pcper.com/article.php?aid...e=expert&pid=1Quote:
Initial rumors had the RV790 pegged as a speed optimized RV770, which currently powers the Radeon HD 4800 series of cards. Recent information has hinted that there is far more than a simple speed increase, and AMD could be catching us unawares with a potentially exciting new part. I take a look at AMD's releases over the past two years and make a few guesses as to what we might expect to see.
http://largon.wippiespace.com/smilies/blah.gifQuote:
Originally Posted by PCPer
Ok, so what we have here is more rumor recycling with guessing based on info from yesteryear!
What next?
Predictions on RV790's Vantage scores based on chicken bones & dried bat wings?
deleted
by request of AMD/ATi