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Differences What are the advantages of each

Front view of Radeon RX 580

Reasons to consider the
AMD Radeon RX 580

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Higher clock speed 1,257 MHz vs 1,050 MHz Around 20% higher clock speed
Higher effective memory clock speed 8,000 MHz vs 6,000 MHz Around 35% higher effective memory clock speed
More memory 8,192 MB vs 6,144 MB Around 35% more memory
Better floating-point performance 6,175 GFLOPS vs 4,300.8 GFLOPS Around 45% better floating-point performance
Significantly higher memory clock speed 2,000 MHz vs 1,500 MHz Around 35% higher memory clock speed
Much lower TDP 185W vs 375W 2x lower TDP
Front view of Radeon HD 7970 X2

Reasons to consider the
HIS Radeon HD 7970 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Much higher memory bandwidth 576 GB/s vs 256 GB/s 2.2x higher memory bandwidth
Significantly more shading units 4,096 vs 2,304 1792 more shading units
Significantly more texture mapping units 256 vs 144 112 more texture mapping units
Higher texture rate 268.8 GTexel/s vs 193 GTexel/s Around 40% higher texture rate
Higher pixel rate 67.2 GPixel/s vs 42.88 GPixel/s More than 55% higher pixel rate
Significantly more render output processors 64 vs 32 Twice as many render output processors
Significantly more compute units 64 vs 36 28 more compute units
Wider memory bus 768 bit vs 256 bit 3x wider memory bus

Features Key features of the Radeon RX 580  vs HD 7970 X2 

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

Radeon RX 580
256 GB/s

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

Radeon RX 580
42.88 GPixel/s
Radeon HD 7970 X2
67.2 GPixel/s

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

Radeon RX 580
193 GTexel/s
Radeon HD 7970 X2
268.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 580
6,175 GFLOPS
Radeon HD 7970 X2
4,300.8 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

gpu

Radeon RX 580  vs
HD 7970 X2 
GPU brand AMD AMD
GPU name Polaris 20 New Zealand
Clock speed 1,257 MHz 1,050 MHz
Is dual GPU No Yes
Reference card None AMD Radeon HD 7970 X2 925 MHz 6 GB

raw performance

Shading units 2,304 4,096
Texture mapping units 144 256
Render output processors 32 64
Compute units 36 64
Pixel rate 42.88 GPixel/s 67.2 GPixel/s
Texture rate 193 GTexel/s 268.8 GTexel/s
Floating-point performance 6,175 GFLOPS 4,300.8 GFLOPS

memory

Radeon RX 580  vs
HD 7970 X2 
Memory clock speed 2,000 MHz 1,500 MHz
Effective memory clock speed 8,000 MHz 6,000 MHz
Memory bus 256 bit 768 bit
Memory 8,192 MB 6,144 MB
Memory type GDDR5 GDDR5
Memory bandwidth 256 GB/s 576 GB/s

noise and power

TDP 185W 375W

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