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Differences What are the advantages of each

Front view of Radeon HD 4870 X2

Reasons to consider the
ATi Radeon HD 4870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher clock speed 700 MHz vs 498 MHz More than 40% higher clock speed
Better floating-point performance 2,240 GFLOPS vs 39.84 GFLOPS Around 56.2x better floating-point performance
Significantly more shading units 1,600 vs 40 1560 more shading units
Higher pixel rate 22.4 GPixel/s vs 1.99 GPixel/s More than 11.2x higher pixel rate
Significantly more render output processors 32 vs 4 28 more render output processors
Higher texture rate 56 GTexel/s vs 1.99 GTexel/s Around 28.2x higher texture rate
More texture mapping units 80 vs 4 76 more texture mapping units
More compute units 20 vs 2 18 more compute units
Front view of Radeon HD 4200 IGP

Reasons to consider the
ATI Radeon HD 4200 IGP

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GPUBoss is not aware of any important advantages of the ATI Radeon HD 4200 IGP vs the ATi Radeon HD 4870 X2.

Features Key features of the Radeon HD 4870 X2  vs 4200 IGP 

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

Radeon HD 4870 X2
22.4 GPixel/s
Radeon HD 4200 IGP
1.99 GPixel/s

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

Radeon HD 4870 X2
56 GTexel/s
Radeon HD 4200 IGP
1.99 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4870 X2
2,240 GFLOPS
Radeon HD 4200 IGP
39.84 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

compute units Discrete cores within the GPU

Specifications Full list of technical specs

gpu

Radeon HD 4870 X2  vs
4200 IGP 
GPU brand ATI ATi
GPU name R700 RS880
Clock speed 700 MHz 498 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Radeon HD 4870 X2  vs
4200 IGP 
Shading units 1,600 40
Texture mapping units 80 4
Render output processors 32 4
Compute units 20 2
Pixel rate 22.4 GPixel/s 1.99 GPixel/s
Texture rate 56 GTexel/s 1.99 GTexel/s
Floating-point performance 2,240 GFLOPS 39.84 GFLOPS

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