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Differences What are the advantages of each

Front view of Radeon HD 8570

Reasons to consider the
AMD Radeon HD 8570

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More memory 2,048 MB vs 512 MB 4x more memory
Front view of Radeon HD 5670 640SP

Reasons to consider the
ATi Radeon HD 5670 640SP

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Significantly higher effective memory clock speed 4,000 MHz vs 1,800 MHz Around 2.2x higher effective memory clock speed
Higher memory bandwidth 64 GB/s vs 28.8 GB/s Around 2.2x higher memory bandwidth
More shading units 640 vs 384 256 more shading units
Higher memory clock speed 1,000 MHz vs 900 MHz More than 10% higher memory clock speed

Features Key features of the Radeon HD 8570  vs 5670 640SP 

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

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

Radeon HD 8570
6.24 GPixel/s

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

Radeon HD 8570
18.72 GTexel/s
Radeon HD 5670 640SP
24 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8570
599 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 8570  vs
5670 640SP 
GPU brand AMD ATI
GPU name Oland Juniper
Market Desktop Desktop
Clock speed 730 MHz 750 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 384 640
Texture mapping units 24 32
Render output processors 8 8
Compute units 6 8
Pixel rate 6.24 GPixel/s 6 GPixel/s
Texture rate 18.72 GTexel/s 24 GTexel/s
Floating-point performance 599 GFLOPS 960 GFLOPS

memory

Radeon HD 8570  vs
5670 640SP 
Memory clock speed 900 MHz 1,000 MHz
Effective memory clock speed 1,800 MHz 4,000 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 512 MB
Memory type GDDR3 GDDR5
Memory bandwidth 28.8 GB/s 64 GB/s

noise and power

TDP 50W 64W

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