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Differences What are the advantages of each

Front view of Radeon HD 7970M

Reasons to consider the
AMD Radeon HD 7970M

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Significantly better 3DMark06 score 22,370.5 vs 14,396 More than 55% better 3DMark06 score
Higher clock speed 850 MHz vs 675 MHz More than 25% higher clock speed
Significantly higher memory bandwidth 153.6 GB/s vs 64 GB/s Around 2.5x higher memory bandwidth
Better floating-point performance 2,176 GFLOPS vs 1,080 GFLOPS More than 2x better floating-point performance
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher texture rate 68 GTexel/s vs 27 GTexel/s More than 2.5x higher texture rate
Higher pixel rate 27.2 GPixel/s vs 10.8 GPixel/s More than 2.5x higher pixel rate
Higher effective memory clock speed 4,800 MHz vs 4,000 MHz 20% higher effective memory clock speed
More texture mapping units 80 vs 40 Twice as many texture mapping units
More render output processors 32 vs 16 Twice as many render output processors
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More compute units 20 vs 10 Twice as many compute units
More shading units 1,280 vs 800 480 more shading units
Higher memory clock speed 1,200 MHz vs 1,000 MHz 20% higher memory clock speed
Front view of Radeon HD 6870M

Reasons to consider the
AMD Radeon HD 6870M

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Better 3DMark 11 graphics score 14,396 vs 5,645 More than 2.5x better 3DMark 11 graphics score
Lower TDP 50W vs 100W 2x lower TDP

Benchmarks Real world tests of Radeon HD 7970M vs 6870M

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

3DMark06 Industry standard benchmark that tests DirectX 9 GPU performance

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