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Ok, so here's a kind of recap about Pascal and the Tesla P100.

This is Tesla P100:

And this is Pascal's P100 core diagram:

First things first: The chip has 8x512-bit memory controllers for a total of 4096-bit memory bus width. This is because the P100 uses 4xHBM2 memory stacks instead of GDDR5.

The GPU itself is compromised of 6 GPCs (Graphics Processor Cluster), with each cluster comprised of 10 SMs (Streaming Multiprocessor). This is a departure from Maxwell and its 4 SMs for each GPC, of which also had 6 GPUnits.

Now let's take a closer look at a SM unit

As you can see, each Pascal SM is comprised of 64 CUDA cores (or shaders) and 4 Texture Units, whereas Maxwell also had 4 Texture Units but the Shader Units count was twice as much with 128.

That's because Nvidia has focused a lot on the computing side of things, improving its single precision (FP32) performance but specially it's Double Precision (FP64) results, achieving a whooping 1:2 ratio between single and double precision compared to the paltry 1:32 ratio of Maxwell (that was beated by Kepler).

Finally, the chip features 14MB of shared register files and 4MB of L2 cache.

And here is a table comparing the Tesla P100 with the previous Tesla products and top-end cards:

	Tesla P100		Tesla M40	GTX Titan X		Tesla K40	GTX Titan Black
GPU	GP100		GM200	GM200		GK110B	GK110B
Architecture	Pascal		Maxwell 2	Maxwell 2		Kepler	Kepler
GPC	6		6	6		5	5
SMs	56		24	24		15	15
CUDA Cores/SM	64		128	128		192	192
CUDA Cores	3584		3072	3072		2880	2880
Texture Units/SM	4		4	4		16	16
Texture Units	224		192	192		240	240
ROPs	-		96	96		48	48
Core Clock	1328 MHz		948 MHz	1000MHz		745 MHz	889MHz
Boost Clock	1480 MHz		1114 MHz	1075MHz		810/875 MHz	980MHz
Memory Type	HBM2		GDDR5	GDDR5		GDDR5	GDDR5
Memory Clock	1,4GHz		6GHz	7GHz		6GHz	7GHz
Memory Bus Width	4096-bit		384-bit	384-bit		384-bit	384-bit
Memory Bandwidth	720GB/sec		288GB/sec	336GB/sec		288GB/sec	336GB/sec
VRAM	16 GB		12 GB	12GB		6 GB	6GB
TDP	300 Watts		250 Watts	250W		235 Watts	250W
Transistor Count	15.3 Billions		8 Billions	8 Billions		7.1 Billions	7.1 Billions
Single Precision FP32	10.6 TFLOPS		6.8 TFLOPS	6.14 TFLOPS		4.29 TFLOPS	5.1 TFlops
FP64	1/2 FP32		1/32 FP32	1/32 FP32		1/3 FP32	1/3 FP32
Double Precision FP64	5.3 TFLOPS		213 GFLOPS	-		1.43 TFLOPS	-
Manufacturing Process	TSMC 16nm		TSMC 28nm	TSMC 28nm		TSMC 28nm	TSMC 28nm
GPU Die Size	610 mm²		601 mm²	601 mm²		551 mm²	551 mm²

Of course, anyone expecting the upcoming GTX 1080/1070 (or whatever they are called) to be as big as P100 will be disappointed. Expect the 1080/1070 to be based on a GP 104 chip with the number of Graphics Processor Clusters reduced to 4, and the 1060/1050 to have 2 GPCs.