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Differences What are the advantages of each

Front view of Radeon HD 5450 PCI

Reasons to consider the
ATi Radeon HD 5450 PCI

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Significantly lower TDP 19W vs 105W 5.5x lower TDP
Front view of GeForce GT 545

Reasons to consider the
Nvidia GeForce GT 545

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Much higher effective memory clock speed 4,000 MHz vs 666 MHz More than 6x higher effective memory clock speed
Higher clock speed 871 MHz vs 650 MHz Around 35% higher clock speed
Higher memory bandwidth 64 GB/s vs 5.33 GB/s More than 12x higher memory bandwidth
Much higher memory clock speed 1,000 MHz vs 333 MHz More than 3x higher memory clock speed
More render output processors 16 vs 4 12 more render output processors
Slightly higher texture rate 20.9 GTexel/s vs 5.2 GTexel/s More than 4x higher texture rate
More texture mapping units 24 vs 8 Three times as many texture mapping units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus

Features Key features of the Radeon HD 5450 PCI  vs GeForce GT 545 

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 5450 PCI
2.6 GPixel/s
GeForce GT 545
5.23 GPixel/s

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

Radeon HD 5450 PCI
5.2 GTexel/s
GeForce GT 545
20.9 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5450 PCI
104 GFLOPS
GeForce GT 545
501.4 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 5450 PCI  vs
GeForce GT 545 
GPU brand ATI Nvidia
GPU name Cedar GF116
Market Desktop Desktop
Clock speed 650 MHz 871 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GT 545 720 MHz 1.5 GB

raw performance

Shading units 80 144
Texture mapping units 8 24
Render output processors 4 16
Pixel rate 2.6 GPixel/s 5.23 GPixel/s
Texture rate 5.2 GTexel/s 20.9 GTexel/s
Floating-point performance 104 GFLOPS 501.4 GFLOPS

memory

Radeon HD 5450 PCI  vs
GeForce GT 545 
Memory clock speed 333 MHz 1,000 MHz
Effective memory clock speed 666 MHz 4,000 MHz
Memory bus 64 bit 128 bit
Memory 512 MB 1,024 MB
Memory type DDR2 GDDR5
Memory bandwidth 5.33 GB/s 64 GB/s

noise and power

TDP 19W 105W

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