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Differences What are the advantages of each

Front view of Radeon HD 5450 PCIe x1

Reasons to consider the
ATi Radeon HD 5450 PCIe x1

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Lower TDP 19W vs 55W 2.9x lower TDP
Front view of Radeon HD 4720

Reasons to consider the
ATi Radeon HD 4720

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Slightly higher effective memory clock speed 1,334 MHz vs 1,000 MHz Around 35% higher effective memory clock speed
More texture mapping units 32 vs 8 24 more texture mapping units
More shading units 320 vs 80 240 more shading units
Higher memory clock speed 667 MHz vs 500 MHz Around 35% higher memory clock speed
Wider memory bus 128 bit vs 64 bit 2x wider memory bus

Features Key features of the Radeon HD 5450 PCIe x1  vs 4720 

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 PCIe x1
2.6 GPixel/s
Radeon HD 4720
4.8 GPixel/s

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

Radeon HD 5450 PCIe x1
5.2 GTexel/s
Radeon HD 4720
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4720
384 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 PCIe x1  vs
4720 
GPU brand ATI ATI
GPU name Cedar RV730
Market Desktop Desktop
Clock speed 650 MHz 600 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 80 320
Texture mapping units 8 32
Render output processors 4 8
Compute units 2 4
Pixel rate 2.6 GPixel/s 4.8 GPixel/s
Texture rate 5.2 GTexel/s 19.2 GTexel/s
Floating-point performance 104 GFLOPS 384 GFLOPS

memory

Radeon HD 5450 PCIe x1  vs
4720 
Memory clock speed 500 MHz 667 MHz
Effective memory clock speed 1,000 MHz 1,334 MHz
Memory bus 64 bit 128 bit
Memory 512 MB 1,024 MB
Memory type DDR3 GDDR3
Memory bandwidth 8 GB/s 21.34 GB/s

noise and power

TDP 19W 55W

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