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Differences What are the advantages of each

Front view of Radeon HD 7870

Reasons to consider the
AMD Radeon HD 7870

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Significantly better PassMark score 4,339 vs 1,279 Around 3.5x better PassMark score
Higher clock speed 1,000 MHz vs 700 MHz Around 45% higher clock speed
Higher effective memory clock speed 4,800 MHz vs 3,600 MHz Around 35% higher effective memory clock speed
Higher texture rate 80 GTexel/s vs 56 GTexel/s Around 45% higher texture rate
Higher pixel rate 32 GPixel/s vs 22.4 GPixel/s Around 45% higher pixel rate
Higher memory clock speed 1,200 MHz vs 900 MHz Around 35% higher memory clock speed
Better cloud gate factor score 19.78 vs 18.34 Around 10% better cloud gate factor score
Significantly lower TDP 175W vs 286W Around 40% lower TDP
Front view of Radeon HD 4870 X2

Reasons to consider the
ATi Radeon HD 4870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Significantly higher memory bandwidth 230.4 GB/s vs 153.6 GB/s More than 50% higher memory bandwidth
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
More shading units 1,600 vs 1,280 320 more shading units

Benchmarks Real world tests of Radeon HD 7870 vs 4870 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

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