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Differences What are the advantages of each

Front view of Radeon HD 8950M

Reasons to consider the
AMD Radeon HD 8950M

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Better floating-point performance 1,254 GFLOPS vs 641.3 GFLOPS More than 95% better floating-point performance
More shading units 896 vs 384 512 more shading units
More texture mapping units 56 vs 32 24 more texture mapping units
Front view of GeForce GTX 660M

Reasons to consider the
Nvidia GeForce GTX 660M

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Higher clock speed 835 MHz vs 700 MHz Around 20% higher clock speed

Features Key features of the Radeon HD 8950M  vs GeForce GTX 660M 

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

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

Radeon HD 8950M
11.2 GPixel/s
GeForce GTX 660M
6.68 GPixel/s

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

Radeon HD 8950M
39.2 GTexel/s
GeForce GTX 660M
26.72 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8950M
1,254 GFLOPS
GeForce GTX 660M
641.3 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

Specifications Full list of technical specs

gpu

Radeon HD 8950M  vs
GeForce GTX 660M 
GPU brand AMD Nvidia
GPU name Saturn GK107
Market Laptop Laptop
Clock speed 700 MHz 835 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 896 384
Texture mapping units 56 32
Render output processors 16 16
Pixel rate 11.2 GPixel/s 6.68 GPixel/s
Texture rate 39.2 GTexel/s 26.72 GTexel/s
Floating-point performance 1,254 GFLOPS 641.3 GFLOPS

memory

Radeon HD 8950M  vs
GeForce GTX 660M 
Memory clock speed 1,000 MHz 1,000 MHz
Effective memory clock speed 4,000 MHz 4,000 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 64 GB/s 64 GB/s

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