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Differences What are the advantages of each

Front view of Mobility Radeon HD 5470

Reasons to consider the
ATi Mobility Radeon HD 5470

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Higher clock speed 750 MHz vs 500 MHz 50% higher clock speed
Higher effective memory clock speed 3,200 MHz vs 1,700 MHz Around 90% higher effective memory clock speed
Front view of Mobility Radeon HD 4850

Reasons to consider the
ATi Mobility Radeon HD 4850

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Better PassMark score 864 vs 234 Around 3.8x better PassMark score
Much wider memory bus 256 bit vs 64 bit 4x wider memory bus
Higher memory bandwidth 54.4 GB/s vs 25.6 GB/s More than 2x higher memory bandwidth
Better floating-point performance 800 GFLOPS vs 120 GFLOPS Around 6.8x better floating-point performance
More shading units 800 vs 80 720 more shading units
More texture mapping units 40 vs 8 32 more texture mapping units
More compute units 10 vs 1 9 more compute units
More render output processors 16 vs 4 12 more render output processors
Slightly higher texture rate 20 GTexel/s vs 6 GTexel/s More than 3.2x higher texture rate

Benchmarks Real world tests of Mobility Radeon HD 5470 vs 4850

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Mobility Radeon HD 5470  vs 4850 

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

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

floating point performance How fast the gpu can crunch numbers

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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