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Differences What are the advantages of each

Front view of Radeon R5 M445

Reasons to consider the
AMD Radeon R5 M445

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Higher clock speed 900 MHz vs 823 MHz Around 10% higher clock speed
Higher turbo clock speed 980 MHz vs 888 MHz More than 10% higher turbo clock speed
Front view of GeForce GTX 660

Reasons to consider the
Nvidia GeForce GTX 660

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Significantly higher effective memory clock speed 5,600 MHz vs 1,800 MHz More than 3x higher effective memory clock speed
Significantly higher memory bandwidth 179.2 GB/s vs 14.4 GB/s Around 12.5x higher memory bandwidth
Higher texture rate 79 GTexel/s vs 21.6 GTexel/s Around 3.8x higher texture rate
Better floating-point performance 1,896.2 GFLOPS vs 691.2 GFLOPS Around 2.8x better floating-point performance
More texture mapping units 96 vs 24 72 more texture mapping units
More render output processors 32 vs 8 24 more render output processors
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Higher pixel rate 19.75 GPixel/s vs 7.2 GPixel/s Around 2.8x higher pixel rate
More shading units 1,152 vs 384 Three times as many shading units
Significantly higher memory clock speed 1,400 MHz vs 900 MHz More than 55% higher memory clock speed
Wider memory bus 256 bit vs 64 bit 4x wider memory bus

Features Key features of the Radeon R5 M445  vs GeForce GTX 660 

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

Radeon R5 M445
14.4 GB/s
GeForce GTX 660
179.2 GB/s

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

Radeon R5 M445
7.2 GPixel/s
GeForce GTX 660
19.75 GPixel/s

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

Radeon R5 M445
21.6 GTexel/s
GeForce GTX 660
79 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R5 M445
691.2 GFLOPS
GeForce GTX 660
1,896.2 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

Specifications Full list of technical specs

gpu

Radeon R5 M445  vs
GeForce GTX 660 
GPU brand AMD Nvidia
GPU name Meso GK104
Clock speed 900 MHz 823 MHz
Turbo clock speed 980 MHz 888 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GTX 660 980 MHz 2 GB

raw performance

Shading units 384 1,152
Texture mapping units 24 96
Render output processors 8 32
Pixel rate 7.2 GPixel/s 19.75 GPixel/s
Texture rate 21.6 GTexel/s 79 GTexel/s
Floating-point performance 691.2 GFLOPS 1,896.2 GFLOPS

memory

Radeon R5 M445  vs
GeForce GTX 660 
Memory clock speed 900 MHz 1,400 MHz
Effective memory clock speed 1,800 MHz 5,600 MHz
Memory bus 64 bit 256 bit
Memory 1,024 MB 2,048 MB
Memory type DDR3 GDDR5
Memory bandwidth 14.4 GB/s 179.2 GB/s

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