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Differences What are the advantages of each

Front view of Radeon Pro 580

Reasons to consider the
AMD Radeon Pro 580

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Much higher clock speed 1,257 MHz vs 680 MHz Around 85% higher clock speed
Significantly more memory 8,192 MB vs 2,048 MB 4x more memory
Much higher effective memory clock speed 8,000 MHz vs 3,600 MHz Around 2.2x higher effective memory clock speed
Significantly better floating-point performance 6,175 GFLOPS vs 1,305.6 GFLOPS Around 4.8x better floating-point performance
Significantly higher memory bandwidth 256 GB/s vs 115.2 GB/s Around 2.2x higher memory bandwidth
Significantly higher texture rate 193 GTexel/s vs 32.6 GTexel/s Around 6x higher texture rate
Significantly more texture mapping units 144 vs 48 Three times as many texture mapping units
Much higher memory clock speed 2,000 MHz vs 900 MHz Around 2.2x higher memory clock speed
Higher pixel rate 42.9 GPixel/s vs 21.76 GPixel/s More than 95% higher pixel rate
Significantly more shading units 2,304 vs 960 1344 more shading units
Significantly more compute units 36 vs 12 Three times as many compute units
Front view of Radeon HD 6970M Mac

Reasons to consider the
AMD Radeon HD 6970M Mac

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Lower TDP 75W vs 150W 2x lower TDP

Features Key features of the Radeon Pro 580  vs HD 6970M Mac 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon Pro 580
256 GB/s
Radeon HD 6970M Mac
115.2 GB/s

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

Radeon Pro 580
42.9 GPixel/s
Radeon HD 6970M Mac
21.76 GPixel/s

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

Radeon Pro 580
193 GTexel/s
Radeon HD 6970M Mac
32.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon Pro 580
6,175 GFLOPS
Radeon HD 6970M Mac
1,305.6 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

Specifications Full list of technical specs


Radeon Pro 580  vs
HD 6970M Mac 
GPU name Polaris 20 Blackcomb
Clock speed 1,257 MHz 680 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 2,304 960
Texture mapping units 144 48
Render output processors 32 32
Compute units 36 12
Pixel rate 42.9 GPixel/s 21.76 GPixel/s
Texture rate 193 GTexel/s 32.6 GTexel/s
Floating-point performance 6,175 GFLOPS 1,305.6 GFLOPS


Radeon Pro 580  vs
HD 6970M Mac 
Memory clock speed 2,000 MHz 900 MHz
Effective memory clock speed 8,000 MHz 3,600 MHz
Memory bus 256 bit 256 bit
Memory 8,192 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 256 GB/s 115.2 GB/s

noise and power

TDP 150W 75W


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