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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 590 MHz Around 15% higher clock speed
Much better T-Rex score 3,212.28 vs 1,503.22 Around 2.2x better T-Rex score
Slightly more shading units 320 vs 144 176 more shading units
Front view of GeForce GT 555M

Reasons to consider the
Nvidia GeForce GT 555M

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More memory 1,536 MB vs 512 MB 3x more memory
More render output processors 24 vs 8 Three times as many render output processors
Slightly higher memory bandwidth 43.2 GB/s vs 25.6 GB/s Around 70% higher memory bandwidth
Wider memory bus 192 bit vs 128 bit 50% wider memory bus
Higher memory clock speed 900 MHz vs 800 MHz Around 15% higher memory clock speed

Benchmarks Real world tests of Mobility Radeon HD 4670 vs GeForce GT 555M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

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