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Differences What are the advantages of each

Front view of Radeon HD 6400

Reasons to consider the
AMD Radeon HD 6400

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Higher clock speed 625 MHz vs 520 MHz More than 20% higher clock speed
Higher effective memory clock speed 1,600 MHz vs 800 MHz 2x higher effective memory clock speed
Significantly higher memory clock speed 800 MHz vs 400 MHz 2x higher memory clock speed
Front view of GeForce 8400 GS

Reasons to consider the
Nvidia GeForce 8400 GS

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GPUBoss is not aware of any important advantages of the Nvidia GeForce 8400 GS vs the AMD Radeon HD 6400.

Benchmarks Real world tests of Radeon HD 6400 vs GeForce 8400 GS

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Features Key features of the Radeon HD 6400  vs GeForce 8400 GS 

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

Radeon HD 6400
12.8 GB/s
GeForce 8400 GS
6.4 GB/s

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

Radeon HD 6400
2.5 GPixel/s
GeForce 8400 GS
2.08 GPixel/s

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

Radeon HD 6400
5 GTexel/s
GeForce 8400 GS
4.16 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6400
200 GFLOPS
GeForce 8400 GS
39.36 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

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