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Differences What are the advantages of each

Front view of Radeon HD 5490

Reasons to consider the
ATi Radeon HD 5490

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Significantly lower TDP 19W vs 116W 6.1x lower TDP
Front view of GeForce GTX 550 Ti

Reasons to consider the
Nvidia GeForce GTX 550 Ti

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Much higher effective memory clock speed 4,104 MHz vs 1,000 MHz More than 4x higher effective memory clock speed
Significantly higher memory bandwidth 98.5 GB/s vs 8 GB/s More than 12.2x higher memory bandwidth
Higher clock speed 900 MHz vs 650 MHz Around 40% higher clock speed
More render output processors 24 vs 4 20 more render output processors
Better floating-point performance 691.2 GFLOPS vs 104 GFLOPS Around 6.8x better floating-point performance
Significantly higher memory clock speed 1,026 MHz vs 500 MHz More than 2x higher memory clock speed
Higher texture rate 28.8 GTexel/s vs 5.2 GTexel/s More than 5.5x higher texture rate
Wider memory bus 192 bit vs 64 bit 3x wider memory bus
More texture mapping units 32 vs 8 24 more texture mapping units

Features Key features of the Radeon HD 5490  vs GeForce GTX 550 Ti 

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 5490
2.6 GPixel/s
GeForce GTX 550 Ti
7.2 GPixel/s

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

Radeon HD 5490
5.2 GTexel/s
GeForce GTX 550 Ti
28.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5490
104 GFLOPS
GeForce GTX 550 Ti
691.2 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 HD 5490  vs
GeForce GTX 550 Ti 
GPU brand ATI Nvidia
GPU name Cedar GF116
Market Desktop Desktop
Clock speed 650 MHz 900 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 80 192
Texture mapping units 8 32
Render output processors 4 24
Pixel rate 2.6 GPixel/s 7.2 GPixel/s
Texture rate 5.2 GTexel/s 28.8 GTexel/s
Floating-point performance 104 GFLOPS 691.2 GFLOPS

memory

Radeon HD 5490  vs
GeForce GTX 550 Ti 
Memory clock speed 500 MHz 1,026 MHz
Effective memory clock speed 1,000 MHz 4,104 MHz
Memory bus 64 bit 192 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR3 GDDR5
Memory bandwidth 8 GB/s 98.5 GB/s

noise and power

TDP 19W 116W

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