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Differences What are the advantages of each

Front view of Radeon RX Vega

Reasons to consider the
AMD Radeon RX Vega

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Better floating-point performance 13,107 GFLOPS vs 10,609 GFLOPS Around 25% better floating-point performance
Significantly wider memory bus 2,048 bit vs 352 bit More than 5.8x wider memory bus
More shading units 4,096 vs 3,584 512 more shading units
More texture mapping units 256 vs 224 32 more texture mapping units
Front view of GeForce GTX 1080 Ti

Reasons to consider the
Nvidia GeForce GTX 1080 Ti

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Much higher effective memory clock speed 11,008 MHz vs 2,000 MHz More than 5.5x higher effective memory clock speed
More memory 11,264 MB vs 8,192 MB Around 40% more memory
Higher pixel rate 130.2 GPixel/s vs 102.4 GPixel/s More than 25% higher pixel rate
More render output processors 88 vs 64 24 more render output processors
Higher memory clock speed 1,376 MHz vs 1,000 MHz Around 40% higher memory clock speed

Features Key features of the Radeon RX Vega  vs GeForce GTX 1080 Ti 

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

Radeon RX Vega
102.4 GPixel/s
GeForce GTX 1080 Ti
130.2 GPixel/s

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

Radeon RX Vega
307.2 GTexel/s
GeForce GTX 1080 Ti
312.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX Vega
13,107 GFLOPS
GeForce GTX 1080 Ti
10,609 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

Radeon RX Vega  vs
GeForce GTX 1080 Ti 
GPU brand AMD Nvidia
GPU name Greenland GP102
Clock speed 1,500 MHz 1,480 MHz
Turbo clock speed 1,600 MHz 1,582 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 4,096 3,584
Texture mapping units 256 224
Render output processors 64 88
Pixel rate 102.4 GPixel/s 130.2 GPixel/s
Texture rate 307.2 GTexel/s 312.6 GTexel/s
Floating-point performance 13,107 GFLOPS 10,609 GFLOPS

memory

Radeon RX Vega  vs
GeForce GTX 1080 Ti 
Memory clock speed 1,000 MHz 1,376 MHz
Effective memory clock speed 2,000 MHz 11,008 MHz
Memory bus 2,048 bit 352 bit
Memory 8,192 MB 11,264 MB

noise and power

TDP 225W 220W

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