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Differences What are the advantages of each

Front view of Radeon HD 4580

Reasons to consider the
ATi Radeon HD 4580

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Higher clock speed 796 MHz vs 650 MHz More than 20% higher clock speed
Higher effective memory clock speed 1,386 MHz vs 1,000 MHz Around 40% higher effective memory clock speed
Slightly higher memory bandwidth 22.18 GB/s vs 8 GB/s More than 2.8x higher memory bandwidth
Higher memory clock speed 693 MHz vs 500 MHz Around 40% higher memory clock speed
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of Radeon HD 4570

Reasons to consider the
ATi Radeon HD 4570

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Lower TDP 25W vs 65W 2.6x lower TDP

Features Key features of the Radeon HD 4580  vs 4570 

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

Radeon HD 4580
22.18 GB/s

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

Radeon HD 4580
3.18 GPixel/s
Radeon HD 4570
2.6 GPixel/s

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

Radeon HD 4580
6.37 GTexel/s
Radeon HD 4570
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4580
191.04 GFLOPS
Radeon HD 4570
104 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 HD 4580  vs
4570 
GPU brand ATI ATI
GPU name RV635 RV710
Market Desktop Desktop
Clock speed 796 MHz 650 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 120 80
Texture mapping units 8 8
Render output processors 4 4
Compute units 3 1
Pixel rate 3.18 GPixel/s 2.6 GPixel/s
Texture rate 6.37 GTexel/s 5.2 GTexel/s
Floating-point performance 191.04 GFLOPS 104 GFLOPS

memory

Radeon HD 4580  vs
4570 
Memory clock speed 693 MHz 500 MHz
Effective memory clock speed 1,386 MHz 1,000 MHz
Memory bus 128 bit 64 bit
Memory 512 MB 1,024 MB
Memory type GDDR3 DDR2
Memory bandwidth 22.18 GB/s 8 GB/s

noise and power

TDP 65W 25W

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