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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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Higher memory bandwidth 115.2 GB/s vs 80 GB/s Around 45% higher memory bandwidth
More shading units 800 vs 384 416 more shading units
Slightly wider memory bus 256 bit vs 128 bit 2x wider memory bus
Front view of GeForce GTX 650

Reasons to consider the
Colorful GeForce GTX 650

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Higher clock speed 1,058 MHz vs 750 MHz More than 40% higher clock speed
Higher effective memory clock speed 5,000 MHz vs 3,600 MHz Around 40% higher effective memory clock speed
Significantly better sky diver factor score 151.81 vs 2.24 Around 67.8x better sky diver factor score
Higher memory clock speed 1,250 MHz vs 900 MHz Around 40% higher memory clock speed
Significantly lower TDP 65W vs 150W 2.3x lower TDP

Benchmarks Real world tests of Radeon HD 4870 vs GeForce GTX 650

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 GTX 650

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Crysis: Warhead (2012) 1920x1200 - Frost Bench - Enthusiast Quality + 4xAA

Radeon HD 4870
18.6 fps
GeForce GTX 650
17.8 fps

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

Reviews Word on the street

Radeon HD 4870  vs GeForce GTX 650 

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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