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Differences What are the advantages of each

Front view of Radeon Sky 500

Reasons to consider the
AMD Radeon Sky 500

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Lower TDP 150W vs 185W Around 20% lower TDP
Front view of Radeon RX 580

Reasons to consider the
AMD Radeon RX 580

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Significantly higher clock speed 1,257 MHz vs 950 MHz More than 30% higher clock speed
Significantly higher effective memory clock speed 8,000 MHz vs 4,800 MHz More than 65% higher effective memory clock speed
More memory 8,192 MB vs 4,096 MB 2x more memory
Significantly better floating-point performance 6,175 GFLOPS vs 2,432 GFLOPS More than 2.5x better floating-point performance
Higher memory bandwidth 256 GB/s vs 153.6 GB/s More than 65% higher memory bandwidth
Significantly higher texture rate 193 GTexel/s vs 76 GTexel/s More than 2.5x higher texture rate
Much higher memory clock speed 2,000 MHz vs 1,200 MHz More than 65% higher memory clock speed
More shading units 2,304 vs 1,280 1024 more shading units
More texture mapping units 144 vs 80 64 more texture mapping units
Higher pixel rate 42.88 GPixel/s vs 30.4 GPixel/s More than 40% higher pixel rate
More compute units 36 vs 20 16 more compute units

Features Key features of the Radeon Sky 500  vs RX 580 

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

Radeon Sky 500
153.6 GB/s
Radeon RX 580
256 GB/s

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

Radeon Sky 500
30.4 GPixel/s
Radeon RX 580
42.88 GPixel/s

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

Radeon Sky 500
76 GTexel/s
Radeon RX 580
193 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon Sky 500
2,432 GFLOPS
Radeon RX 580
6,175 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 Sky 500  vs
RX 580 
GPU name Pitcairn Polaris 20
Clock speed 950 MHz 1,257 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,280 2,304
Texture mapping units 80 144
Render output processors 32 32
Compute units 20 36
Pixel rate 30.4 GPixel/s 42.88 GPixel/s
Texture rate 76 GTexel/s 193 GTexel/s
Floating-point performance 2,432 GFLOPS 6,175 GFLOPS


Radeon Sky 500  vs
RX 580 
Memory clock speed 1,200 MHz 2,000 MHz
Effective memory clock speed 4,800 MHz 8,000 MHz
Memory bus 256 bit 256 bit
Memory 4,096 MB 8,192 MB
Memory type GDDR5 GDDR5
Memory bandwidth 153.6 GB/s 256 GB/s

noise and power

TDP 150W 185W


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