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Differences What are the advantages of each

Front view of Radeon R9 270

Reasons to consider the
AMD Radeon R9 270

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Much higher effective memory clock speed 5,600 MHz vs 666 MHz Around 8.5x higher effective memory clock speed
Much higher memory bandwidth 179.2 GB/s vs 5.33 GB/s Around 33.8x higher memory bandwidth
Higher clock speed 900 MHz vs 650 MHz Around 40% higher clock speed
Significantly better floating-point performance 2,368 GFLOPS vs 104 GFLOPS More than 22.8x better floating-point performance
Significantly higher texture rate 74 GTexel/s vs 5.2 GTexel/s Around 14.2x higher texture rate
More memory 2,048 MB vs 512 MB 4x more memory
Higher pixel rate 29.6 GPixel/s vs 2.6 GPixel/s Around 11.5x higher pixel rate
Much higher memory clock speed 1,400 MHz vs 333 MHz Around 4.2x higher memory clock speed
Significantly more shading units 1,280 vs 80 1200 more shading units
Significantly more render output processors 32 vs 4 28 more render output processors
Significantly more texture mapping units 80 vs 8 72 more texture mapping units
Significantly more compute units 20 vs 2 18 more compute units
Significantly wider memory bus 256 bit vs 64 bit 4x wider memory bus
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 150W 7.9x lower TDP

Features Key features of the Radeon R9 270  vs HD 5450 PCI 

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

Radeon R9 270
179.2 GB/s
Radeon HD 5450 PCI
5.33 GB/s

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

Radeon R9 270
29.6 GPixel/s
Radeon HD 5450 PCI
2.6 GPixel/s

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

Radeon R9 270
74 GTexel/s
Radeon HD 5450 PCI
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R9 270
2,368 GFLOPS
Radeon HD 5450 PCI
104 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 R9 270  vs
HD 5450 PCI 
GPU brand AMD ATI
GPU name Curacao Cedar
Market Desktop Desktop
Clock speed 900 MHz 650 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,280 80
Texture mapping units 80 8
Render output processors 32 4
Compute units 20 2
Pixel rate 29.6 GPixel/s 2.6 GPixel/s
Texture rate 74 GTexel/s 5.2 GTexel/s
Floating-point performance 2,368 GFLOPS 104 GFLOPS

memory

Radeon R9 270  vs
HD 5450 PCI 
Memory clock speed 1,400 MHz 333 MHz
Effective memory clock speed 5,600 MHz 666 MHz
Memory bus 256 bit 64 bit
Memory 2,048 MB 512 MB
Memory type GDDR5 DDR2
Memory bandwidth 179.2 GB/s 5.33 GB/s

noise and power

TDP 150W 19W

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