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Differences What are the advantages of each

Front view of Radeon HD 4580

Reasons to consider the
ATi Radeon HD 4580

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Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce GT 730

Reasons to consider the
Nvidia GeForce GT 730

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Much higher effective memory clock speed 5,012 MHz vs 1,386 MHz More than 3.5x higher effective memory clock speed
Higher clock speed 902 MHz vs 796 MHz Around 15% higher clock speed
Significantly higher memory clock speed 1,253 MHz vs 693 MHz More than 80% higher memory clock speed
Higher memory bandwidth 40.1 GB/s vs 22.18 GB/s More than 80% higher memory bandwidth
Slightly better floating-point performance 692.7 GFLOPS vs 191.04 GFLOPS Around 3.8x better floating-point performance
More shading units 384 vs 120 264 more shading units
Lower TDP 38W vs 65W More than 40% lower TDP

Features Key features of the Radeon HD 4580  vs GeForce GT 730 

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

Radeon HD 4580
22.18 GB/s
GeForce GT 730
40.1 GB/s

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

Radeon HD 4580
3.18 GPixel/s
GeForce GT 730
7.22 GPixel/s

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

Radeon HD 4580
6.37 GTexel/s
GeForce GT 730
14.43 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4580
191.04 GFLOPS
GeForce GT 730
692.7 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 4580  vs
GeForce GT 730 
GPU brand ATI Nvidia
GPU name RV635 GK117
Market Desktop Desktop
Clock speed 796 MHz 902 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GT 730 700 MHz 1 GB

raw performance

Shading units 120 384
Texture mapping units 8 16
Render output processors 4 8
Pixel rate 3.18 GPixel/s 7.22 GPixel/s
Texture rate 6.37 GTexel/s 14.43 GTexel/s
Floating-point performance 191.04 GFLOPS 692.7 GFLOPS

memory

Radeon HD 4580  vs
GeForce GT 730 
Memory clock speed 693 MHz 1,253 MHz
Effective memory clock speed 1,386 MHz 5,012 MHz
Memory bus 128 bit 64 bit
Memory 512 MB 1,024 MB
Memory type GDDR3 GDDR5
Memory bandwidth 22.18 GB/s 40.1 GB/s

noise and power

TDP 65W 38W

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