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Differences What are the advantages of each

Front view of Radeon HD 5550

Reasons to consider the
ATi Radeon HD 5550

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Significantly higher effective memory clock speed 3,200 MHz vs 800 MHz 4x higher effective memory clock speed
Better 3DMark06 score 6,350 vs 2,930 Around 2.2x better 3DMark06 score
Higher memory bandwidth 51.2 GB/s vs 6.4 GB/s 8x higher memory bandwidth
Significantly higher memory clock speed 800 MHz vs 400 MHz 2x higher memory clock speed
Better sky diver factor score 57.53 vs 19.5 Around 3x better sky diver factor score
More shading units 320 vs 80 240 more shading units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of Radeon HD 5450

Reasons to consider the
ATi Radeon HD 5450

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Higher clock speed 650 MHz vs 550 MHz Around 20% higher clock speed
Slightly lower TDP 19W vs 39W 2.1x lower TDP

Benchmarks Real world tests of Radeon HD 5550 vs 5450

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

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

3DMark Vantage Graphics Industry standard benchmark that tests DirectX 10 GPU performance

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

PassMark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

CLBenchmark Raytrace Measures compute performance using OpenCL to do raytracing

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