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Differences What are the advantages of each

Front view of Radeon HD 7770

Reasons to consider the
AMD Radeon HD 7770

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Much higher effective memory clock speed 4,500 MHz vs 1,802 MHz Around 2.5x higher effective memory clock speed
Better PassMark score 2,194 vs 872 More than 2.5x better PassMark score
Higher clock speed 1,000 MHz vs 825 MHz More than 20% higher clock speed
Significantly better cloud gate factor score 16.18 vs 10.96 Around 50% better cloud gate factor score
Higher memory clock speed 1,125 MHz vs 901 MHz Around 25% higher memory clock speed
Significantly lower TDP 80W vs 165W 2.1x 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 72 GB/s More than 60% higher memory bandwidth
Much wider memory bus 512 bit vs 128 bit 4x wider memory bus
More render output processors 32 vs 16 Twice as many render output processors
Higher pixel rate 26.4 GPixel/s vs 16 GPixel/s Around 65% higher pixel rate

Benchmarks Real world tests of Radeon HD 7770 vs 3870 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 7770

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street


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