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Differences What are the advantages of each

Front view of Radeon HD 5450

Reasons to consider the
ATi Radeon HD 5450

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Slightly higher clock speed 650 MHz vs 580 MHz More than 10% higher clock speed
Lower TDP 19W vs 70W 3.7x lower TDP
Front view of Mobility Radeon HD 3850 X2

Reasons to consider the
ATi Mobility Radeon HD 3850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 96 GB/s vs 6.4 GB/s Around 15x higher memory bandwidth
Significantly more render output processors 32 vs 4 28 more render output processors
Higher pixel rate 18.56 GPixel/s vs 2.6 GPixel/s Around 7.2x higher pixel rate
Higher effective memory clock speed 1,500 MHz vs 800 MHz Around 90% higher effective memory clock speed
More shading units 640 vs 80 560 more shading units
Higher memory clock speed 750 MHz vs 400 MHz Around 90% higher memory clock speed
Wider memory bus 512 bit vs 64 bit 8x wider memory bus
More texture mapping units 32 vs 8 24 more texture mapping units
More compute units 8 vs 2 6 more compute units

Features Key features of the Radeon HD 5450  vs Mobility Radeon HD 3850 X2 

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
2.6 GPixel/s

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

Radeon HD 5450
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5450

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


Radeon HD 5450  vs
Mobility Radeon HD 3850 X2 
GPU name Cedar M88
Market Desktop Laptop
Clock speed 650 MHz 580 MHz
Is dual GPU No Yes
Reference card None None

raw performance

Shading units 80 640
Texture mapping units 8 32
Render output processors 4 32
Compute units 2 8
Pixel rate 2.6 GPixel/s 18.56 GPixel/s
Texture rate 5.2 GTexel/s 18.56 GTexel/s
Floating-point performance 104 GFLOPS 742.4 GFLOPS


Radeon HD 5450  vs
Mobility Radeon HD 3850 X2 
Memory clock speed 400 MHz 750 MHz
Effective memory clock speed 800 MHz 1,500 MHz
Memory bus 64 bit 512 bit
Memory 512 MB 1,024 MB
Memory type DDR2 GDDR3
Memory bandwidth 6.4 GB/s 96 GB/s

noise and power

TDP 19W 70W


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