Nvidia Pascal GP100 Die Shot Photo

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Over at the Hot Chips symposium Nvidia has been sharing a thing or two with media. Quite interesting is a new photo series of the GP100. Now do not confuse GP100 with the GP102 that is housed in the Nvidia Titan X (Pascal).

The GP100 is the GPU that houses HBM2 is referred to as BIG Pascal. Ryan over at Anandtech posted an actual die shot of the graphics processor, and man that thing is just HUGE as it is 610mm2. Big Pascal made on TSMC's 16 nanometer silicon fab process. 

Ya'll ready? here it is:

GP100 in particular comes with stacked HBM2 (16GB in four stacks). The Pascal based GPU driving the unit holds 15 Billion transistors which is roughly double that of the current biggest Maxwell chip. Gp100 is huge at 610mm^2. The prognosis performance (according to Nvidia) is 5.3TFLOPS using 64-bit floating-point numbers and is rated at 10.6TFLOPS using 32-bit and 21.2TFLOPS using 16-bit. P100 has 4MB of L2 cache and 14MB of shared memory for just the register file. The following table provides a high-level comparison of Tesla P100 specifications compared to previous-generation Tesla GPU accelerators, I added the GP100 as a fully enabled product:

Tesla Products Tesla K40 Tesla M40 Tesla P100 GP100
GPU GK110 (Kepler) GM200 (Maxwell) GP100 (Pascal) GP100 (Pascal)
SMs 15 24 56 60
TPCs 15 24 28 30
FP32 CUDA Cores / SM 192 128 64 64
FP32 CUDA Cores / GPU 2880 3072 3584 3840
FP64 CUDA Cores / SM 64 4 32 32
FP64 CUDA Cores / GPU 960 96 1792 1920
Base Clock 745 MHz 948 MHz 1328 MHz ~1328 MHz
GPU Boost Clock 810/875 MHz  1114 MHz 1480 MHz ~1480 MHz
Texture Units 240 192 224 240
Memory Interface 384-bit GDDR5 384-bit GDDR5 4096-bit HBM2 4096-bit HBM2
Memory Size Up to 12 GB Up to 24 GB 16 GB 16 GB
L2 Cache Size 1536 KB 3072 KB 4096 KB 4096 KB
Register File Size / SM 256 KB 256 KB 256 KB 256 KB
Register File Size / GPU 3840 KB 6144 KB 14336 KB 14336 KB
TDP 235 Watts 250 Watts 300 Watts ~300 Watts
Transistors 7.1 billion 8 billion 15.3 billion 15.3 billion
GPU Die Size 551 mm² 601 mm² 610 mm² 610 mm²
Manufacturing Process 28-nm 28-nm 16-nm 16-nm

As the block diagram now shows, the GP100 features six graphics processing clusters (GPCs). Just look at the diagram and count that each GPC holds 10 streaming multiprocessors (SMs) and then each SM has 64 CUDA cores and four texture units. Do the math and you'll reach 640 shader processors per GPC and 3840 shader cores with 240 texture units in total. 6 (GPC) x (10x64) = 3840 Shader processor units in total. Some additional photos can be spotted below including an actual photo of the GP100 silicon. Click the thumbnails to enlarge.

Nvidia Pascal GP100 Die Shot Photo

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