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Differences What are the advantages of each

Front view of Radeon RX 580 XTR

Reasons to consider the
AMD Radeon RX 580 XTR

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Higher clock speed 1,257 MHz vs 1,000 MHz More than 25% higher clock speed
More memory 8,192 MB vs 6,144 MB Around 35% more memory
Higher effective memory clock speed 8,000 MHz vs 7,012 MHz Around 15% higher effective memory clock speed
Higher turbo clock speed 1,340 MHz vs 1,076 MHz Around 25% higher turbo clock speed
Higher memory clock speed 2,000 MHz vs 1,753 MHz Around 15% higher memory clock speed
Lower TDP 185W vs 250W More than 25% lower TDP
Front view of GeForce GTX 980 Ti

Reasons to consider the
Nvidia GeForce GTX 980 Ti

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Significantly higher pixel rate 96 GPixel/s vs 42.88 GPixel/s Around 2.2x higher pixel rate
Many more render output processors 96 vs 32 Three times as many render output processors
More shading units 2,816 vs 2,304 512 more shading units
More texture mapping units 176 vs 144 32 more texture mapping units

Features Key features of the Radeon RX 580 XTR  vs GeForce GTX 980 Ti 

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

Radeon RX 580 XTR
42.88 GPixel/s
GeForce GTX 980 Ti
96 GPixel/s

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

Radeon RX 580 XTR
193 GTexel/s
GeForce GTX 980 Ti
176 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 580 XTR
6,175 GFLOPS
GeForce GTX 980 Ti
5,632 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 580 XTR  vs
GeForce GTX 980 Ti 
GPU brand AMD Nvidia
GPU name Polaris 20 GM200
Clock speed 1,257 MHz 1,000 MHz
Turbo clock speed 1,340 MHz 1,076 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 2,304 2,816
Texture mapping units 144 176
Render output processors 32 96
Pixel rate 42.88 GPixel/s 96 GPixel/s
Texture rate 193 GTexel/s 176 GTexel/s
Floating-point performance 6,175 GFLOPS 5,632 GFLOPS

memory

Radeon RX 580 XTR  vs
GeForce GTX 980 Ti 
Memory clock speed 2,000 MHz 1,753 MHz
Effective memory clock speed 8,000 MHz 7,012 MHz
Memory bus 256 bit 384 bit
Memory 8,192 MB 6,144 MB
Memory type GDDR5 GDDR5

noise and power

TDP 185W 250W

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