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Differences What are the advantages of each

Front view of Radeon HD 8750M

Reasons to consider the
AMD Radeon HD 8750M

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Higher effective memory clock speed 4,000 MHz vs 1,700 MHz More than 2.2x higher effective memory clock speed
More memory 2,048 MB vs 512 MB 4x more memory
Better PassMark score 1,041 vs 728 Around 45% better PassMark score
Higher memory clock speed 1,000 MHz vs 850 MHz Around 20% higher memory clock speed
Front view of Mobility Radeon HD 3870

Reasons to consider the
ATi Mobility Radeon HD 3870

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Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More render output processors 16 vs 8 Twice as many render output processors

Benchmarks Real world tests of Radeon HD 8750M vs Mobility Radeon HD 3870

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon HD 8750M  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 8750M
6.2 GPixel/s
Mobility Radeon HD 3870
10.56 GPixel/s

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

Radeon HD 8750M
18.6 GTexel/s
Mobility Radeon HD 3870
10.56 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8750M
595.2 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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