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Differences What are the advantages of each

Front view of Radeon HD 7670M

Reasons to consider the
AMD Radeon HD 7670M

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Higher effective memory clock speed 3,600 MHz vs 1,700 MHz More than 2x higher effective memory clock speed
Lower TDP 20W vs 55W 2.7x lower TDP
Front view of Mobility Radeon HD 3870

Reasons to consider the
ATi Mobility Radeon HD 3870

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Slightly higher clock speed 660 MHz vs 600 MHz 10% higher clock speed
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus

Benchmarks Real world tests of Radeon HD 7670M vs Mobility Radeon HD 3870

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon HD 7670M  vs Mobility Radeon HD 3870 

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 7670M
9.6 GPixel/s
Mobility Radeon HD 3870
10.56 GPixel/s

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

Radeon HD 7670M
14.4 GTexel/s
Mobility Radeon HD 3870
10.56 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7670M
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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