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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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More memory 4,096 MB vs 2,048 MB 2x more memory
Better floating-point performance 2,432 GFLOPS vs 1,211 GFLOPS More than 2x better floating-point performance
Higher memory bandwidth 153.6 GB/s vs 112 GB/s More than 35% higher memory bandwidth
Higher texture rate 76 GTexel/s vs 37.86 GTexel/s More than 2x higher texture rate
Higher pixel rate 30.4 GPixel/s vs 18.93 GPixel/s More than 60% higher pixel rate
More shading units 1,280 vs 512 768 more shading units
More texture mapping units 80 vs 32 48 more texture mapping units
More render output processors 32 vs 16 Twice as many render output processors
More compute units 20 vs 8 12 more compute units
Front view of Radeon RX 550

Reasons to consider the
AMD Radeon RX 550

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Higher effective memory clock speed 7,000 MHz vs 4,800 MHz More than 45% higher effective memory clock speed
Higher clock speed 1,100 MHz vs 950 MHz More than 15% higher clock speed
Significantly higher memory clock speed 1,750 MHz vs 1,200 MHz More than 45% higher memory clock speed
Significantly lower TDP 50W vs 150W 3x lower TDP

Features Key features of the Radeon Sky 500  vs RX 550 

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

Radeon Sky 500
153.6 GB/s
Radeon RX 550
112 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 550
18.93 GPixel/s

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

Radeon Sky 500
76 GTexel/s
Radeon RX 550
37.86 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon Sky 500
2,432 GFLOPS
Radeon RX 550
1,211 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 550 
GPU name Pitcairn Lexa
Clock speed 950 MHz 1,100 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,280 512
Texture mapping units 80 32
Render output processors 32 16
Compute units 20 8
Pixel rate 30.4 GPixel/s 18.93 GPixel/s
Texture rate 76 GTexel/s 37.86 GTexel/s
Floating-point performance 2,432 GFLOPS 1,211 GFLOPS


Radeon Sky 500  vs
RX 550 
Memory clock speed 1,200 MHz 1,750 MHz
Effective memory clock speed 4,800 MHz 7,000 MHz
Memory bus 256 bit 128 bit
Memory 4,096 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 153.6 GB/s 112 GB/s

noise and power

TDP 150W 50W


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