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Differences What are the advantages of each

Front view of GeForce GT 8800

Reasons to consider the
ASUS GeForce GT 8800

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Higher clock speed 700 MHz vs 520 MHz Around 35% higher clock speed
Higher memory bandwidth 64.6 GB/s vs 6.4 GB/s More than 10x higher memory bandwidth
Higher effective memory clock speed 2,020 MHz vs 800 MHz More than 2.5x higher effective memory clock speed
Slightly better PassMark score 754 vs 114 More than 6.5x better PassMark score
Higher texture rate 39.2 GTexel/s vs 4.16 GTexel/s Around 9.5x 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
Significantly wider memory bus 256 bit vs 64 bit 4x wider memory bus
Higher pixel rate 11.2 GPixel/s vs 2.08 GPixel/s Around 5.5x higher pixel rate
More render output processors 16 vs 4 12 more render output processors
Front view of GeForce 8400 GS

Reasons to consider the
Nvidia GeForce 8400 GS

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Significantly lower TDP 25W vs 125W 5x lower TDP

Benchmarks Real world tests of GeForce GT 8800 vs 8400 GS

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GT 8800  vs 8400 GS 

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

GeForce GT 8800
64.6 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 GT 8800
11.2 GPixel/s
GeForce 8400 GS
2.08 GPixel/s

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

GeForce GT 8800
39.2 GTexel/s
GeForce 8400 GS
4.16 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 8800
392 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

Comments

Showing 1 comment.
The 8800 GT is truly awesome!!! I couldn't do without it. I'm combining 2 PCs and 8400 GS is no match for 8800 GT.
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