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Differences What are the advantages of each

Front view of Radeon HD 4870

Reasons to consider the
ATi Radeon HD 4870

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Significantly higher memory bandwidth 115.2 GB/s vs 28.8 GB/s 4x higher memory bandwidth
Significantly higher effective memory clock speed 3,600 MHz vs 1,800 MHz 2x higher effective memory clock speed
Better floating-point performance 1,200 GFLOPS vs 311.04 GFLOPS More than 3.8x better floating-point performance
Significantly better T-Rex score 3,353.62 vs 2,599.51 Around 30% better T-Rex score
More shading units 800 vs 96 704 more shading units
More render output processors 16 vs 4 12 more render output processors
Higher pixel rate 12 GPixel/s vs 3.24 GPixel/s Around 3.8x higher pixel rate
Slightly higher texture rate 30 GTexel/s vs 12.96 GTexel/s More than 2.2x higher texture rate
Wider memory bus 256 bit vs 128 bit 2x wider memory bus
More texture mapping units 40 vs 16 24 more texture mapping units
Front view of GeForce GT 440

Reasons to consider the
Nvidia GeForce GT 440

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Better sky diver factor score 66.66 vs 2.24 Around 29.8x better sky diver factor score
Significantly lower TDP 65W vs 150W 2.3x lower TDP

Benchmarks Real world tests of Radeon HD 4870 vs GeForce GT 440

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 4870
GeForce GT 440

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

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

Reviews Word on the street

Radeon HD 4870  vs GeForce GT 440 

When the top cooling assembly with the fan is removed, one big heatsink remains which looks very much like a Thermalright product.
Radeon HD 4870

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