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Differences What are the advantages of each

Front view of GeForce 9300 GS

Reasons to consider the
Nvidia GeForce 9300 GS

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Slightly higher clock speed 589 MHz vs 520 MHz Around 15% higher clock speed
Front view of GeForce 8400 GS

Reasons to consider the
Nvidia GeForce 8400 GS

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Slightly higher effective memory clock speed 800 MHz vs 666 MHz More than 20% higher effective memory clock speed
Slightly higher memory clock speed 400 MHz vs 333 MHz More than 20% higher memory clock speed

Benchmarks Real world tests of GeForce 9300 GS vs 8400 GS

Cloud Gate Factor Data courtesy FutureMark

Features Key features of the GeForce 9300 GS  vs 8400 GS 

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

GeForce 9300 GS
5.33 GB/s
GeForce 8400 GS
6.4 GB/s

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

GeForce 9300 GS
5.61 GPixel/s
GeForce 8400 GS
2.08 GPixel/s

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

GeForce 9300 GS
11.22 GTexel/s
GeForce 8400 GS
4.16 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 9300 GS
44.86 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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