Obviously every generation has it's largest chip. But the GK-110 was about 20% larger than even the 500 series chips by surface area, and was (iirc) the largest piece of silicon ever used in a GPU. GK-110 and it's successors also represented a fracturing of the enthusiast market, from what had been a two chip to a three chip strategy. On those bases I think it's fairer to treat the GK-110 and the cards it powered as being meaningfully different
As above, neither the GK 104 nor 110 chips eactly matched their predecessors in size, one was smaller and the other bigger, so it's a little more complicated than saying it was a renaming of the '60 and '70 models. As mentioned Nivida had wanted to create a 'really ****ing huge' chip for the 200 series, but ended up releasing it for the mainstream. Thus in some ways the 200, 400 and 500 series were unusual.
The thread title is 'GTX 1070/1080 cost the same as 680/670 (after FX & inflation)'. This was chosen as they were the most recent point, where we had a new architecture + new manufacturing process occurring at the same time. If you'd like to perform another comparison go ahead do it;'d be interesting.
What's this two chip to three chip strategy? there has always been numerous chips each generation. If it's a strategy, it didn't last long, It was two cards per chip for Maxwell and it's looking the same for Pascal.
And the 200 series, they were talking about the G80 been the biggest baddest chip ever, just like when the GF110 was released they claimed the same thing and again for the GK110, again, the biggest baddest chip ever. They did release a monster chip for the 200 series and in no way was it mainstream, it was very expensive.
There is nothing different or special about the GK110. It's the biggest chip they could make on the technology and process at the time, just like the GF110 was, just like the G80 was.
And no card generation has exactly match their the previous generation in size after a die shrink. You know why? Because there has been a die shrink. And a lot of the time they are not exactly the same size during a generational refresh either.
Look at the 1080 and 1070, they are replacing the 980 and 970. Why? because they are both based off the Gxxx4 chip. See my table in a previous post.
Just like the 560ti and 560(GF114) were replaced by the 680 and 670 (GK104). Not complicated at all, just a name change. It's just marketing, I don't think anybody would have paid $499 for the 680 if it had been called the 660ti? There certainly would have been a huge uproar about it.
I don't need to work anything out, I know the price has increased massively. We are getting charged high end prices for second tier cards. And that all started with the switch from the 500 series to the 600 series. That's why your comparison is flawed. You need to work it out from when the actual big price hike occurred, there is no point in doing it after it occurred as it's too late.