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Differences What are the advantages of each

Front view of Radeon HD 6930

Reasons to consider the
AMD Radeon HD 6930

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Significantly better 3DMark06 score 26,350 vs 18,060 More than 45% better 3DMark06 score
Front view of GeForce GTX 660

Reasons to consider the
Nvidia GeForce GTX 660

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Better 3DMark vantage graphics score 25,130 vs 19,070 More than 30% better 3DMark vantage graphics score
Higher effective memory clock speed 5,600 MHz vs 4,800 MHz More than 15% higher effective memory clock speed
Better 3DMark 11 graphics score 6,850 vs 4,880 More than 40% better 3DMark 11 graphics score
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher memory bandwidth 179.2 GB/s vs 153.6 GB/s More than 15% higher memory bandwidth
Slightly higher clock speed 823 MHz vs 750 MHz Around 10% higher clock speed
Better fire strike factor score 44.27 vs 26.32 Around 70% better fire strike factor score
Higher texture rate 79 GTexel/s vs 60 GTexel/s More than 30% higher texture rate
Higher memory clock speed 1,400 MHz vs 1,200 MHz More than 15% higher memory clock speed
More texture mapping units 96 vs 80 16 more texture mapping units
Lower TDP 130W vs 186W More than 30% lower TDP

Benchmarks Real world tests of Radeon HD 6930 vs GeForce GTX 660

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

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

3DMark06 Industry standard benchmark that tests DirectX 9 GPU performance

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

CLBenchmark Raytrace Measures compute performance using OpenCL to do raytracing

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