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Differences What are the advantages of each

Front view of GeForce GT 9400

Reasons to consider the
Nvidia GeForce GT 9400

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Lower TDP 50W vs 125W 2.5x lower TDP
Front view of GeForce GT 8800

Reasons to consider the
ASUS GeForce GT 8800

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Higher effective memory clock speed 2,020 MHz vs 800 MHz More than 2.5x higher effective memory clock speed
Higher clock speed 700 MHz vs 550 MHz More than 25% higher clock speed
Higher memory bandwidth 64.6 GB/s vs 12.8 GB/s More than 5x higher memory bandwidth
Slightly better PassMark score 754 vs 191 Around 4x better PassMark score
Higher texture rate 39.2 GTexel/s vs 4.4 GTexel/s Around 9x higher texture rate
Much higher memory clock speed 1,010 MHz vs 400 MHz More than 2.5x higher memory clock speed
More texture mapping units 56 vs 8 48 more texture mapping units
More render output processors 16 vs 4 12 more render output processors
Higher pixel rate 11.2 GPixel/s vs 2.2 GPixel/s More than 5x higher pixel rate
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Benchmarks Real world tests of GeForce GT 9400 vs 8800

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GT 9400  vs 8800 

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

GeForce GT 9400
12.8 GB/s
GeForce GT 8800
64.6 GB/s

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

GeForce GT 9400
2.2 GPixel/s
GeForce GT 8800
11.2 GPixel/s

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

GeForce GT 9400
4.4 GTexel/s
GeForce GT 8800
39.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 9400
44.8 GFLOPS
GeForce GT 8800
392 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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