First, we can only compare the factory specs provided by NVidia. No one knows how good or bad the new chip will overclock. The boost clock is at 1480+MHz already. Even a slight overclock of 10-15% would give a big performance boost over Titan X. So the standard base and boost rate are somewhat compareble.
Second, under hashcat, a 40% increase in clockrate surely means 40% plus in performance. I agree with you totally for many other applications, but especially hashcat has an almost linear increase of performance (maybe not with all kernels, but at least the ones I use).
Third, the factory specs of Titan X and M40 differ, that's why there are two numbers. It's 1000MHz vs. 948Mhz. I guess the consumer GP100 will also have a slightly higher clock rate.
About your question: each core has new functions and a much better DP-rate. Also the cache is bigger (4MB instead of 3MB). There are now 1792 FP64 cores instead of 96. That's where all the transistors went.
As the factory clock rate saw a +32,8% the ramp up of 50W seems reasonable. You have to see it like that: double the transistors and ramp up clock rate only draw 20% more power. That's not too shabby.
As I mentioned, they disabled a few cores to get a better yield rate. They want to be able to get more usable GPUs out of one wafer, so they disable one of the 15 SMX wether it's broken or not. They did the same with the GK110, where the first series had 2688 cores and the B-version 2880 (Titan and Titan Black). The latter also saw a small die shrink after the production process had been optimised.
Second, under hashcat, a 40% increase in clockrate surely means 40% plus in performance. I agree with you totally for many other applications, but especially hashcat has an almost linear increase of performance (maybe not with all kernels, but at least the ones I use).
Third, the factory specs of Titan X and M40 differ, that's why there are two numbers. It's 1000MHz vs. 948Mhz. I guess the consumer GP100 will also have a slightly higher clock rate.
About your question: each core has new functions and a much better DP-rate. Also the cache is bigger (4MB instead of 3MB). There are now 1792 FP64 cores instead of 96. That's where all the transistors went.
As the factory clock rate saw a +32,8% the ramp up of 50W seems reasonable. You have to see it like that: double the transistors and ramp up clock rate only draw 20% more power. That's not too shabby.
As I mentioned, they disabled a few cores to get a better yield rate. They want to be able to get more usable GPUs out of one wafer, so they disable one of the 15 SMX wether it's broken or not. They did the same with the GK110, where the first series had 2688 cores and the B-version 2880 (Titan and Titan Black). The latter also saw a small die shrink after the production process had been optimised.