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Differences What are the advantages of each

Front view of Radeon HD 5450

Reasons to consider the
ATi Radeon HD 5450

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Significantly lower TDP 19W vs 150W 7.9x lower TDP
Front view of Radeon HD 4870

Reasons to consider the
ATi Radeon HD 4870

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Much higher effective memory clock speed 3,600 MHz vs 800 MHz 4.5x higher effective memory clock speed
Much higher memory bandwidth 115.2 GB/s vs 6.4 GB/s 18x higher memory bandwidth
Better PassMark score 1,379 vs 231 Around 6x better PassMark score
Much better T-Rex score 3,353.62 vs 1,513.03 Around 2.2x better T-Rex score
Higher clock speed 750 MHz vs 650 MHz More than 15% higher clock speed
Better floating-point performance 1,200 GFLOPS vs 104 GFLOPS More than 11.5x better floating-point performance
More shading units 800 vs 80 720 more shading units
Significantly higher memory clock speed 900 MHz vs 400 MHz 2.2x higher memory clock speed
Higher texture rate 30 GTexel/s vs 5.2 GTexel/s More than 5.8x higher texture rate
Significantly wider memory bus 256 bit vs 64 bit 4x wider memory bus
Higher pixel rate 12 GPixel/s vs 2.6 GPixel/s More than 4.5x higher pixel rate
More texture mapping units 40 vs 8 32 more texture mapping units
More render output processors 16 vs 4 12 more render output processors
More compute units 10 vs 2 8 more compute units

Benchmarks Real world tests of Radeon HD 5450 vs 4870

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 5450
1,513.03
Radeon HD 4870
3,353.62

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

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Comments

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Hd 4870 dx 10 only and not support dx 11, hd 5450 support dx 11 :p
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