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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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Significantly lower TDP 75W vs 175W 2.3x lower TDP
Front view of Radeon HD 7870

Reasons to consider the
AMD Radeon HD 7870

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Much better 3DMark06 score 23,230 vs 10,760 Around 2.2x better 3DMark06 score
Significantly better 3DMark vantage graphics score 23,592 vs 10,190 More than 2.2x better 3DMark vantage graphics score
Significantly higher memory bandwidth 153.6 GB/s vs 73.6 GB/s More than 2x higher memory bandwidth
Better 3DMark 11 graphics score 6,194 vs 2,700 More than 2.2x better 3DMark 11 graphics score
Better floating-point performance 2,560 GFLOPS vs 806.4 GFLOPS Around 3.2x better floating-point performance
Higher texture rate 80 GTexel/s vs 25.2 GTexel/s Around 3.2x higher texture rate
Higher pixel rate 32 GPixel/s vs 8.4 GPixel/s More than 3.8x higher pixel rate
Significantly better fire strike factor score 50.19 vs 18.96 Around 2.8x better fire strike factor score
Significantly more render output processors 32 vs 8 24 more render output processors
Significantly more shading units 1,280 vs 384 896 more shading units
Significantly more texture mapping units 80 vs 24 56 more texture mapping units
More compute units 20 vs 6 14 more compute units
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Benchmarks Real world tests of Radeon HD 8670 vs 7870

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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