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Differences What are the advantages of each

Front view of Radeon HD 5770

Reasons to consider the
ATi Radeon HD 5770

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Much higher effective memory clock speed 4,800 MHz vs 1,802 MHz Around 2.8x higher effective memory clock speed
Better PassMark score 1,697 vs 872 Around 95% better PassMark score
Better cloud gate factor score 14.6 vs 10.96 Around 35% better cloud gate factor score
Higher memory clock speed 1,200 MHz vs 901 MHz Around 35% higher memory clock speed
Lower TDP 108W vs 165W Around 35% lower TDP
Front view of Radeon HD 3870 X2

Reasons to consider the
ATi Radeon HD 3870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 115.32 GB/s vs 76.8 GB/s More than 50% higher memory bandwidth
Much wider memory bus 512 bit vs 128 bit 4x wider memory bus
Higher pixel rate 26.4 GPixel/s vs 13.6 GPixel/s Around 95% higher pixel rate
More render output processors 32 vs 16 Twice as many render output processors

Benchmarks Real world tests of Radeon HD 5770 vs 3870 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

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