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Differences What are the advantages of each

Front view of Radeon HD 6670

Reasons to consider the
AMD Radeon HD 6670

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Higher clock speed 800 MHz vs 600 MHz Around 35% higher clock speed
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
Slightly higher memory clock speed 1,000 MHz vs 900 MHz More than 10% higher memory clock speed
Front view of Radeon HD 6650A

Reasons to consider the
AMD Radeon HD 6650A

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Slightly lower TDP 45W vs 66W More than 30% lower TDP

Benchmarks Real world tests of Radeon HD 6670 vs 6650A

PassMark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

Features Key features of the Radeon HD 6670  vs 6650A 

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

Radeon HD 6670
64 GB/s
Radeon HD 6650A
28.8 GB/s

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

Radeon HD 6670
6.4 GPixel/s
Radeon HD 6650A
4.8 GPixel/s

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

Radeon HD 6670
19.2 GTexel/s
Radeon HD 6650A
14.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6670
768 GFLOPS
Radeon HD 6650A
576 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

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