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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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Higher effective memory clock speed 4,800 MHz vs 3,600 MHz Around 35% higher effective memory clock speed
Higher clock speed 850 MHz vs 750 MHz Around 15% higher clock speed
Significantly better sky diver factor score 140.24 vs 2.24 More than 62.5x better sky diver factor score
Higher memory clock speed 1,200 MHz vs 900 MHz Around 35% higher memory clock speed
Lower TDP 108W vs 150W Around 30% lower TDP
Front view of Radeon HD 4870

Reasons to consider the
ATi Radeon HD 4870

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Higher memory bandwidth 115.2 GB/s vs 76.8 GB/s More than 50% higher memory bandwidth
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Benchmarks Real world tests of Radeon HD 5770 vs 4870

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

3DMark Vantage (Texture Fill) Industry standard benchmark that tests DirectX performance

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 5770
Radeon HD 4870

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Battleforge 1920x1200 - Maximum quality + 4XAA

Radeon HD 4870
38.7 fps

Hawx 1920 x 1200 - Maximum quality + Low AO + 4xAA

SmallLux GPU 2.0d4 Measures compute performance using OpenCL to do 3D rendering

Reviews Word on the street

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