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Differences What are the advantages of each

Front view of Mobility Radeon HD 4670

Reasons to consider the
ATi Mobility Radeon HD 4670

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Higher clock speed 675 MHz vs 500 MHz 35% higher clock speed
More shading units 320 vs 96 224 more shading units
Front view of GeForce GTS 250M

Reasons to consider the
Nvidia GeForce GTS 250M

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Higher effective memory clock speed 3,200 MHz vs 1,600 MHz 2x higher effective memory clock speed
Higher memory bandwidth 51.2 GB/s vs 25.6 GB/s 2x higher memory bandwidth
Higher texture rate 40 GTexel/s vs 21.6 GTexel/s More than 85% higher texture rate

Benchmarks Real world tests of Mobility Radeon HD 4670 vs GeForce GTS 250M

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Features Key features of the Mobility Radeon HD 4670  vs GeForce GTS 250M 

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

GeForce GTS 250M
10 GPixel/s

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

Mobility Radeon HD 4670
21.6 GTexel/s
GeForce GTS 250M
40 GTexel/s

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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