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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 600 MHz Around 10% higher clock speed
Slightly lower TDP 19W vs 30W More than 35% lower TDP
Front view of Radeon E4690 PCIe

Reasons to consider the
Generic Radeon E4690 PCIe

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Slightly higher effective memory clock speed 1,400 MHz vs 800 MHz 75% higher effective memory clock speed
Higher memory clock speed 700 MHz vs 400 MHz 75% higher memory clock speed
More texture mapping units 32 vs 8 24 more texture mapping units

Features Key features of the Radeon HD 5450  vs E4690 PCIe 

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

Radeon HD 5450
6.4 GB/s
Radeon E4690 PCIe
22.4 GB/s

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

Radeon HD 5450
2.6 GPixel/s
Radeon E4690 PCIe
4.8 GPixel/s

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

Radeon HD 5450
5.2 GTexel/s
Radeon E4690 PCIe
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5450
104 GFLOPS
Radeon E4690 PCIe
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  vs
E4690 PCIe 
GPU brand ATI ATI
GPU name Cedar RV730
Market Desktop Laptop
Clock speed 650 MHz 600 MHz
Is dual GPU No No
Reference card None ATi Radeon E4690 PCIe 600 MHz 512 MB

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  vs
E4690 PCIe 
Memory clock speed 400 MHz 700 MHz
Effective memory clock speed 800 MHz 1,400 MHz
Memory bus 64 bit 128 bit
Memory 512 MB 512 MB
Memory type DDR2 GDDR3
Memory bandwidth 6.4 GB/s 22.4 GB/s

noise and power

TDP 19W 30W

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