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Differences What are the advantages of each

Front view of Radeon HD 5670

Reasons to consider the
ATi Radeon HD 5670

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Much higher effective memory clock speed 4,000 MHz vs 1,334 MHz Around 3x higher effective memory clock speed
Higher clock speed 775 MHz vs 600 MHz Around 30% higher clock speed
Higher memory bandwidth 64 GB/s vs 21.34 GB/s Around 3x higher memory bandwidth
Higher memory clock speed 1,000 MHz vs 667 MHz Around 50% higher memory clock speed
Front view of Radeon HD 4720

Reasons to consider the
ATi Radeon HD 4720

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Slightly more texture mapping units 32 vs 20 12 more texture mapping units

Features Key features of the Radeon HD 5670  vs 4720 

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

Radeon HD 5670
64 GB/s
Radeon HD 4720
21.34 GB/s

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

Radeon HD 5670
6.2 GPixel/s
Radeon HD 4720
4.8 GPixel/s

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

Radeon HD 5670
15.5 GTexel/s
Radeon HD 4720
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5670
620 GFLOPS
Radeon HD 4720
384 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 5670  vs
4720 
GPU brand ATI ATI
GPU name Redwood RV730
Market Desktop Desktop
Clock speed 775 MHz 600 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 400 320
Texture mapping units 20 32
Render output processors 8 8
Compute units 5 4
Pixel rate 6.2 GPixel/s 4.8 GPixel/s
Texture rate 15.5 GTexel/s 19.2 GTexel/s
Floating-point performance 620 GFLOPS 384 GFLOPS

memory

Radeon HD 5670  vs
4720 
Memory clock speed 1,000 MHz 667 MHz
Effective memory clock speed 4,000 MHz 1,334 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR3
Memory bandwidth 64 GB/s 21.34 GB/s

noise and power

TDP 64W 55W

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