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Differences What are the advantages of each

Front view of Radeon HD 6770M

Reasons to consider the
AMD Radeon HD 6770M

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Better 3DMark 11 graphics score 10,056 vs 5,571 More than 80% better 3DMark 11 graphics score
Better 3DMark vantage graphics score 5,159 vs 2,000.5 More than 2.5x better 3DMark vantage graphics score
Higher memory bandwidth 57.6 GB/s vs 25.6 GB/s 2.2x higher memory bandwidth
Slightly better 3DMark06 score 1,328 vs 601 Around 2.2x better 3DMark06 score
More shading units 480 vs 160 Three times as many shading units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More texture mapping units 24 vs 8 Three times as many texture mapping units
More compute units 6 vs 2 Three times as many compute units
Slightly better particle simulation score 77.14 mInteraction/s vs 41.01 mInteraction/s Around 90% better particle simulation score
Higher memory clock speed 900 MHz vs 800 MHz Around 15% higher memory clock speed
Front view of Radeon HD 6490M

Reasons to consider the
AMD Radeon HD 6490M

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Higher clock speed 800 MHz vs 725 MHz More than 10% higher clock speed

Benchmarks Real world tests of Radeon HD 6770M vs 6490M

3DMark 11 Graphics Industry standard benchmark that tests DirectX 11 GPU performance

3DMark Vantage Graphics Industry standard benchmark that tests DirectX 10 GPU performance

Bitcoin mining Data courtesy CompuBench

Radeon HD 6770M
33.39 mHash/s
Radeon HD 6490M
10.81 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 6770M
4.82 mPixels/s
Radeon HD 6490M
2.55 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 6770M
234.83 frames/s
Radeon HD 6490M
96.4 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 6770M
77.14 mInteraction/s
Radeon HD 6490M
41.01 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 6770M
0.39 frames/s
Radeon HD 6490M
-1 frames/s

Video composition Data courtesy CompuBench

Radeon HD 6770M
15.45 frames/s
Radeon HD 6490M
6 frames/s

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