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Differences What are the advantages of each

Front view of GeForce GTX 780M Mac

Reasons to consider the
Nvidia GeForce GTX 780M Mac

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Lower TDP 122W vs 150W Around 20% lower TDP
Front view of GeForce GTX 1080 Mobile

Reasons to consider the
Nvidia GeForce GTX 1080 Mobile

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Much higher clock speed 1,556 MHz vs 771 MHz More than 2x higher clock speed
Much better floating-point performance 7,967 GFLOPS vs 2,368.5 GFLOPS More than 3.2x better floating-point performance
Significantly more memory 8,192 MB vs 4,096 MB 2x more memory
Much higher effective memory clock speed 10,008 MHz vs 5,000 MHz More than 2x higher effective memory clock speed
Much higher pixel rate 99.6 GPixel/s vs 24.67 GPixel/s More than 4x higher pixel rate
Much higher texture rate 249 GTexel/s vs 98.7 GTexel/s More than 2.5x higher texture rate
Much higher turbo clock speed 1,771 MHz vs 797 MHz Around 2.2x higher turbo clock speed
Significantly more render output processors 64 vs 32 Twice as many render output processors
Significantly more shading units 2,560 vs 1,536 1024 more shading units
More texture mapping units 160 vs 128 32 more texture mapping units

Features Key features of the GeForce GTX 780M Mac  vs 1080 Mobile 

pixel rate Number of pixels a graphics card can render to the screen every second

GeForce GTX 780M Mac
24.67 GPixel/s
GeForce GTX 1080 Mobile
99.6 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

GeForce GTX 780M Mac
98.7 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 780M Mac
2,368.5 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

Specifications Full list of technical specs

gpu

GeForce GTX 780M Mac  vs
1080 Mobile 
GPU brand Nvidia Nvidia
GPU name GK104 GP104
Market Laptop Laptop
Clock speed 771 MHz 1,556 MHz
Turbo clock speed 797 MHz 1,771 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,536 2,560
Texture mapping units 128 160
Render output processors 32 64
Pixel rate 24.67 GPixel/s 99.6 GPixel/s
Texture rate 98.7 GTexel/s 249 GTexel/s
Floating-point performance 2,368.5 GFLOPS 7,967 GFLOPS

memory

GeForce GTX 780M Mac  vs
1080 Mobile 
Memory clock speed 1,250 MHz 1,251 MHz
Effective memory clock speed 5,000 MHz 10,008 MHz
Memory bus 256 bit 256 bit
Memory 4,096 MB 8,192 MB
Memory type GDDR5 GDDR5

noise and power

TDP 122W 150W

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