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Differences What are the advantages of each

Front view of Radeon R7 250

Reasons to consider the
Generic Radeon R7 250

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Much higher effective memory clock speed 4,600 MHz vs 666 MHz Around 7x higher effective memory clock speed
Significantly higher clock speed 1,000 MHz vs 650 MHz Around 55% higher clock speed
Significantly higher memory bandwidth 73.6 GB/s vs 5.33 GB/s More than 13.8x higher memory bandwidth
Much higher memory clock speed 1,150 MHz vs 333 MHz Around 3.5x higher memory clock speed
Better floating-point performance 806.4 GFLOPS vs 104 GFLOPS More than 7.8x better floating-point performance
Higher texture rate 25.2 GTexel/s vs 5.2 GTexel/s More than 4.8x higher texture rate
More render output processors 16 vs 4 12 more render output processors
More shading units 384 vs 80 304 more shading units
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
Slightly more compute units 6 vs 2 Three times as many compute units
Front view of Radeon HD 5450 PCI

Reasons to consider the
ATi Radeon HD 5450 PCI

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Lower TDP 19W vs 65W 3.4x lower TDP

Features Key features of the Radeon R7 250  vs HD 5450 PCI 

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

Radeon R7 250
73.6 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 R7 250
8.4 GPixel/s
Radeon HD 5450 PCI
2.6 GPixel/s

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

Radeon R7 250
25.2 GTexel/s
Radeon HD 5450 PCI
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R7 250
806.4 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 R7 250  vs
HD 5450 PCI 
GPU brand AMD ATI
GPU name Oland Cedar
Market Desktop Desktop
Clock speed 1,000 MHz 650 MHz
Is dual GPU No No
Reference card AMD Radeon R7 250 1 GHz 1 GB None

raw performance

Shading units 384 80
Texture mapping units 24 8
Render output processors 16 4
Compute units 6 2
Pixel rate 8.4 GPixel/s 2.6 GPixel/s
Texture rate 25.2 GTexel/s 5.2 GTexel/s
Floating-point performance 806.4 GFLOPS 104 GFLOPS

memory

Radeon R7 250  vs
HD 5450 PCI 
Memory clock speed 1,150 MHz 333 MHz
Effective memory clock speed 4,600 MHz 666 MHz
Memory bus 128 bit 64 bit
Memory 1,024 MB 512 MB
Memory type GDDR5 DDR2
Memory bandwidth 73.6 GB/s 5.33 GB/s

noise and power

TDP 65W 19W

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