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Differences What are the advantages of each

Front view of Radeon HD 5670 640SP

Reasons to consider the
ATi Radeon HD 5670 640SP

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More shading units 640 vs 400 240 more shading units
Slightly more texture mapping units 32 vs 20 12 more texture mapping units
Front view of Radeon HD 5670

Reasons to consider the
ATi Radeon HD 5670

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Slightly more memory 1,024 MB vs 512 MB 2x more memory

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

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 5670
6.2 GPixel/s

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

Radeon HD 5670 640SP
24 GTexel/s
Radeon HD 5670
15.5 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5670
620 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 640SP  vs
5670 
GPU brand ATI ATI
GPU name Juniper Redwood
Market Desktop Desktop
Clock speed 750 MHz 775 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 400
Texture mapping units 32 20
Render output processors 8 8
Compute units 8 5
Pixel rate 6 GPixel/s 6.2 GPixel/s
Texture rate 24 GTexel/s 15.5 GTexel/s
Floating-point performance 960 GFLOPS 620 GFLOPS

memory

Radeon HD 5670 640SP  vs
5670 
Memory clock speed 1,000 MHz 1,000 MHz
Effective memory clock speed 4,000 MHz 4,000 MHz
Memory bus 128 bit 128 bit
Memory 512 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 64 GB/s 64 GB/s

noise and power

TDP 64W 64W

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