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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 1,656 MHz Around 2.2x higher effective memory clock speed
Significantly lower TDP 20W vs 140W 7x lower TDP
Front view of Radeon HD 3850 X2

Reasons to consider the
ATi Radeon HD 3850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 105.98 GB/s vs 57.6 GB/s Around 85% higher memory bandwidth
Slightly higher clock speed 669 MHz vs 600 MHz More than 10% higher clock speed
Higher pixel rate 21.4 GPixel/s vs 9.6 GPixel/s Around 2.2x higher pixel rate
More render output processors 32 vs 16 Twice as many render output processors
Wider memory bus 512 bit vs 128 bit 4x wider memory bus

Benchmarks Real world tests of Radeon HD 7670M vs 3850 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon HD 7670M  vs 3850 X2 

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

Radeon HD 7670M
57.6 GB/s
Radeon HD 3850 X2
105.98 GB/s

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

Radeon HD 7670M
9.6 GPixel/s
Radeon HD 3850 X2
21.4 GPixel/s

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

Radeon HD 7670M
14.4 GTexel/s
Radeon HD 3850 X2
21.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7670M
576 GFLOPS
Radeon HD 3850 X2
856.4 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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