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Differences What are the advantages of each

Front view of Radeon Sky 700

Reasons to consider the
AMD Radeon Sky 700

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Much higher memory bandwidth 264 GB/s vs 6.4 GB/s 41.2x higher memory bandwidth
Much higher effective memory clock speed 5,500 MHz vs 800 MHz Around 7x higher effective memory clock speed
Significantly more memory 6,144 MB vs 512 MB 12x more memory
Higher clock speed 900 MHz vs 650 MHz Around 40% higher clock speed
Better floating-point performance 3,226 GFLOPS vs 104 GFLOPS More than 31x better floating-point performance
Higher texture rate 100.8 GTexel/s vs 5.2 GTexel/s Around 19.5x higher texture rate
Higher pixel rate 28.8 GPixel/s vs 2.6 GPixel/s More than 11x higher pixel rate
Significantly more shading units 1,792 vs 80 1712 more shading units
Significantly more texture mapping units 112 vs 8 104 more texture mapping units
Significantly more render output processors 32 vs 4 28 more render output processors
Much higher memory clock speed 1,375 MHz vs 400 MHz Around 3.5x higher memory clock speed
Significantly more compute units 28 vs 2 26 more compute units
Wider memory bus 384 bit vs 64 bit 6x wider memory bus
Front view of Radeon HD 5450

Reasons to consider the
ATi Radeon HD 5450

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Much lower TDP 19W vs 225W 11.8x lower TDP

Features Key features of the Radeon Sky 700  vs HD 5450 

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

Radeon Sky 700
264 GB/s
Radeon HD 5450
6.4 GB/s

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

Radeon Sky 700
28.8 GPixel/s
Radeon HD 5450
2.6 GPixel/s

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

Radeon Sky 700
100.8 GTexel/s
Radeon HD 5450
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon Sky 700
3,226 GFLOPS
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 Sky 700  vs
HD 5450 
GPU name Tahiti Cedar
Clock speed 900 MHz 650 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,792 80
Texture mapping units 112 8
Render output processors 32 4
Compute units 28 2
Pixel rate 28.8 GPixel/s 2.6 GPixel/s
Texture rate 100.8 GTexel/s 5.2 GTexel/s
Floating-point performance 3,226 GFLOPS 104 GFLOPS


Radeon Sky 700  vs
HD 5450 
Memory clock speed 1,375 MHz 400 MHz
Effective memory clock speed 5,500 MHz 800 MHz
Memory bus 384 bit 64 bit
Memory 6,144 MB 512 MB
Memory type GDDR5 DDR2
Memory bandwidth 264 GB/s 6.4 GB/s

noise and power

TDP 225W 19W


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