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Differences What are the advantages of each

Front view of Mobility Radeon HD 4650

Reasons to consider the
ATi Mobility Radeon HD 4650

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More texture mapping units 32 vs 8 24 more texture mapping units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More shading units 320 vs 80 240 more shading units
Slightly more compute units 4 vs 1 3 more compute units
Front view of Mobility Radeon HD 4570

Reasons to consider the
ATi Mobility Radeon HD 4570

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Higher clock speed 680 MHz vs 500 MHz More than 35% higher clock speed
Higher memory clock speed 800 MHz vs 600 MHz Around 35% higher memory clock speed

Benchmarks Real world tests of Mobility Radeon HD 4650 vs 4570

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Mobility Radeon HD 4650  vs 4570 

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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