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Differences What are the advantages of each

Front view of Radeon HD 8670

Reasons to consider the
AMD Radeon HD 8670

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Higher clock speed 1,000 MHz vs 775 MHz Around 30% higher clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher effective memory clock speed 4,600 MHz vs 4,000 MHz 15% higher effective memory clock speed
Higher memory clock speed 1,150 MHz vs 1,000 MHz 15% higher memory clock speed
Lower TDP 75W vs 127W More than 40% lower TDP
Front view of Radeon HD 6850

Reasons to consider the
AMD Radeon HD 6850

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Better 3DMark06 score 15,040 vs 10,760 Around 40% better 3DMark06 score
Higher memory bandwidth 128 GB/s vs 73.6 GB/s Around 75% higher memory bandwidth
Better 3DMark vantage graphics score 15,230 vs 10,190 Around 50% better 3DMark vantage graphics score
Significantly more render output processors 32 vs 8 24 more render output processors
Higher pixel rate 24.8 GPixel/s vs 8.4 GPixel/s Around 3x higher pixel rate
Better floating-point performance 1,488 GFLOPS vs 806.4 GFLOPS Around 85% better floating-point performance
More shading units 960 vs 384 576 more shading units
Wider memory bus 256 bit vs 128 bit 2x wider memory bus
More texture mapping units 48 vs 24 Twice as many texture mapping units
More compute units 12 vs 6 Twice as many compute units

Benchmarks Real world tests of Radeon HD 8670 vs 6850

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

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