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Differences What are the advantages of each

Front view of Radeon HD 3870 X2

Reasons to consider the
ATi Radeon HD 3870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher clock speed 825 MHz vs 675 MHz More than 20% higher clock speed
Higher pixel rate 26.4 GPixel/s vs 9.45 GPixel/s More than 2.8x higher pixel rate
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
More shading units 640 vs 336 304 more shading units
Front view of GeForce GTX 460

Reasons to consider the
Nvidia GeForce GTX 460

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Significantly higher effective memory clock speed 3,600 MHz vs 1,802 MHz Around 2x higher effective memory clock speed
Significantly better cloud gate factor score 16.4 vs 10.96 Around 50% better cloud gate factor score
More texture mapping units 56 vs 32 24 more texture mapping units

Benchmarks Real world tests of Radeon HD 3870 X2 vs GeForce GTX 460

Cloud Gate Factor Data courtesy FutureMark

Features Key features of the Radeon HD 3870 X2  vs GeForce GTX 460 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon HD 3870 X2
115.32 GB/s
GeForce GTX 460
115.2 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 3870 X2
26.4 GPixel/s
GeForce GTX 460
9.45 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon HD 3870 X2
26.4 GTexel/s
GeForce GTX 460
37.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3870 X2
1,056 GFLOPS
GeForce GTX 460
907.2 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Reviews Word on the street

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