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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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Significantly higher clock speed 1,257 MHz vs 850 MHz Around 50% higher clock speed
Significantly more memory 8,192 MB vs 2,048 MB 4x more memory
Significantly higher effective memory clock speed 8,000 MHz vs 4,800 MHz More than 65% higher effective memory clock speed
Better floating-point performance 6,175 GFLOPS vs 2,720 GFLOPS More than 2.2x 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 68 GTexel/s More than 2.8x higher texture rate
Much higher memory clock speed 2,000 MHz vs 1,200 MHz More than 65% higher memory clock speed
Higher pixel rate 42.88 GPixel/s vs 27.2 GPixel/s Around 60% higher pixel rate
More texture mapping units 144 vs 80 64 more texture mapping units
More compute units 36 vs 20 16 more compute units
More shading units 2,304 vs 1,600 704 more shading units
Front view of Radeon HD 5770 X2

Reasons to consider the
Generic Radeon HD 5770 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU

Features Key features of the Radeon RX 580  vs HD 5770 X2 

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

Radeon RX 580
256 GB/s
Radeon HD 5770 X2
153.6 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 5770 X2
27.2 GPixel/s

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

Radeon RX 580
193 GTexel/s
Radeon HD 5770 X2
68 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 580
6,175 GFLOPS
Radeon HD 5770 X2
2,720 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 5770 X2 
GPU brand AMD ATI
GPU name Polaris 20 Juniper
Clock speed 1,257 MHz 850 MHz
Is dual GPU No Yes
Reference card None ATi Radeon HD 5770 X2 850 MHz 2 GB

raw performance

Shading units 2,304 1,600
Texture mapping units 144 80
Render output processors 32 32
Compute units 36 20
Pixel rate 42.88 GPixel/s 27.2 GPixel/s
Texture rate 193 GTexel/s 68 GTexel/s
Floating-point performance 6,175 GFLOPS 2,720 GFLOPS

memory

Radeon RX 580  vs
HD 5770 X2 
Memory clock speed 2,000 MHz 1,200 MHz
Effective memory clock speed 8,000 MHz 4,800 MHz
Memory bus 256 bit 256 bit
Memory 8,192 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 256 GB/s 153.6 GB/s

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