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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 150W 7.9x lower TDP
Front view of GeForce GTS 250

Reasons to consider the
ZOTAC GeForce GTS 250

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Significantly higher memory bandwidth 73.6 GB/s vs 8 GB/s Around 9.2x higher memory bandwidth
Higher effective memory clock speed 2,300 MHz vs 1,000 MHz More than 2.2x higher effective memory clock speed
Higher clock speed 750 MHz vs 650 MHz More than 15% higher clock speed
Higher texture rate 48 GTexel/s vs 5.2 GTexel/s Around 9.2x higher texture rate
Significantly more texture mapping units 64 vs 8 56 more texture mapping units
Much higher memory clock speed 1,150 MHz vs 500 MHz More than 2.2x higher memory clock speed
Significantly wider memory bus 256 bit vs 64 bit 4x wider memory bus
Higher pixel rate 12 GPixel/s vs 2.6 GPixel/s More than 4.5x higher pixel rate
More render output processors 16 vs 4 12 more render output processors

Features Key features of the Radeon HD 5490  vs GeForce GTS 250 

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

GeForce GTS 250
73.6 GB/s

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

Radeon HD 5490
2.6 GPixel/s
GeForce GTS 250
12 GPixel/s

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

Radeon HD 5490
5.2 GTexel/s
GeForce GTS 250
48 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5490
104 GFLOPS
GeForce GTS 250
483.8 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 GTS 250 
GPU brand ATI Nvidia
GPU name Cedar G92 B1
Market Desktop Desktop
Clock speed 650 MHz 750 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GTS 250 702 MHz 1 GB

raw performance

Shading units 80 128
Texture mapping units 8 64
Render output processors 4 16
Pixel rate 2.6 GPixel/s 12 GPixel/s
Texture rate 5.2 GTexel/s 48 GTexel/s
Floating-point performance 104 GFLOPS 483.8 GFLOPS

memory

Radeon HD 5490  vs
GeForce GTS 250 
Memory clock speed 500 MHz 1,150 MHz
Effective memory clock speed 1,000 MHz 2,300 MHz
Memory bus 64 bit 256 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR3 GDDR3
Memory bandwidth 8 GB/s 73.6 GB/s

noise and power

TDP 19W 150W

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