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Differences What are the advantages of each

Front view of Radeon HD 8550

Reasons to consider the
AMD Radeon HD 8550

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Slightly higher memory bandwidth 25.6 GB/s vs 14.4 GB/s Around 80% higher memory bandwidth
Slightly wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce 940M

Reasons to consider the
Nvidia GeForce 940M

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Significantly higher clock speed 1,072 MHz vs 650 MHz Around 65% higher clock speed
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Slightly higher memory clock speed 900 MHz vs 800 MHz Around 15% higher memory clock speed
Lower TDP 33W vs 60W 45% lower TDP

Features Key features of the Radeon HD 8550  vs GeForce 940M 

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

Radeon HD 8550
25.6 GB/s
GeForce 940M
14.4 GB/s

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

Radeon HD 8550
5.2 GPixel/s
GeForce 940M
8.58 GPixel/s

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

Radeon HD 8550
15.6 GTexel/s
GeForce 940M
25.73 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8550
624 GFLOPS
GeForce 940M
823.3 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 8550  vs
GeForce 940M 
GPU brand AMD Nvidia
GPU name Turks GM108
Market Desktop Laptop
Clock speed 650 MHz 1,072 MHz
Is dual GPU No No
Reference card None Nvidia GeForce 940M 1 GHz 2 GB

raw performance

Shading units 480 384
Texture mapping units 24 24
Render output processors 8 8
Pixel rate 5.2 GPixel/s 8.58 GPixel/s
Texture rate 15.6 GTexel/s 25.73 GTexel/s
Floating-point performance 624 GFLOPS 823.3 GFLOPS

memory

Radeon HD 8550  vs
GeForce 940M 
Memory clock speed 800 MHz 900 MHz
Effective memory clock speed 1,600 MHz 1,800 MHz
Memory bus 128 bit 64 bit
Memory 1,024 MB 2,048 MB
Memory type GDDR3 DDR3
Memory bandwidth 25.6 GB/s 14.4 GB/s

noise and power

TDP 60W 33W

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