2.2x figure would prolly be the theoretical throughput which certainly differs from the practical gain, maybe 70~90% even.
Anyway any1 else besides me have a strong feeling of history repeating like GT200 vs RV770, except I think nvidia will have slightly faster cards than last time.
September, HD 5870 for $299 (and HD 5850 for $199?) is launched that provides 30~50% gain over HD 4890 and will be the fastest single gpu card, may lead to slight price adjustments of other cards for especially nvidia but maybe also ati. Relatively energy efficient cards with great performance/power/cost factor.
Early/mid December, NVIDIA launches the new GT300 single gpu monster with huge power consumption but will have like 70~90% gain over GTX285 but at a price of $599~650. But very few cards will be in stock but hey Santa needs to get a few cards for xmas so the kids won't cry. Real stockage will grow in January. At same time ATI releases HD 5870 X2 to give the new GT300 single gpu card a run for it's money @ $499. This will eventually lead to some price reduction for nvidia and eventually release the dual gpu solution to more specificly point out the so called "performance crown" as they used to talk about a few years ago (yay). ATI then releases quite shortly after (maybe half year after GT300 launch or so) a refresh series with higher clocks with a bit higher performance and some tweaks due to the prices of HD58xx series have become so low at this point and to remain more competitive again (although HD 58xx series have sold well anyway) as ATI knows this is the pricerange were most money is spent.
Just for the luls, have to remember this statement if it actually would turn true. :p
Why do I think a similiar scenario will happen? Because both parts seems to be happy like this when they don't fight each other, they stick to different segments so both parts will get sales, playing safe. Of course this doesn't mean it would be less competition, it would look silly if ATI suddenly would match NVIDIA in performance at a totally different price segments (NVIDIA has beefier cards meant to be sold at a higher price cuz of the higher cost). It's a lot smaller chance of complete disaster this way than directly competing against each other in the entire price segment.
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