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Differences What are the advantages of each

Front view of GeForce 9800M GS

Reasons to consider the
Nvidia GeForce 9800M GS

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Slightly better PassMark score 551 vs 331 More than 65% better PassMark score
Higher memory bandwidth 51.2 GB/s vs 25.6 GB/s 2x higher memory bandwidth
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More render output processors 16 vs 8 Twice as many render output processors
More texture mapping units 32 vs 16 Twice as many texture mapping units
Front view of GeForce 9700M GT

Reasons to consider the
Nvidia GeForce 9700M GT

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Higher clock speed 625 MHz vs 530 MHz Around 20% higher clock speed
Slightly lower TDP 45W vs 60W 25% lower TDP

Benchmarks Real world tests of GeForce 9800M GS vs 9700M GT

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce 9800M GS  vs 9700M GT 

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

GeForce 9800M GS
51.2 GB/s
GeForce 9700M GT
25.6 GB/s

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

GeForce 9800M GS
8.48 GPixel/s
GeForce 9700M GT
5 GPixel/s

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

GeForce 9800M GS
16.96 GTexel/s
GeForce 9700M GT
10 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 9800M GS
169.6 GFLOPS
GeForce 9700M GT
99.2 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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