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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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GPUBoss is not aware of any important advantages of the ATi Radeon HD 4580 vs the Nvidia GeForce GT 440.

Front view of GeForce GT 440

Reasons to consider the
Nvidia GeForce GT 440

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Higher effective memory clock speed 1,800 MHz vs 1,386 MHz Around 30% higher effective memory clock speed
Higher memory clock speed 900 MHz vs 693 MHz Around 30% higher memory clock speed

Features Key features of the Radeon HD 4580  vs GeForce GT 440 

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

Radeon HD 4580
22.18 GB/s
GeForce GT 440
28.8 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 440
3.24 GPixel/s

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

Radeon HD 4580
6.37 GTexel/s
GeForce GT 440
12.96 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4580
191.04 GFLOPS
GeForce GT 440
311.04 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


Radeon HD 4580  vs
GeForce GT 440 
GPU brand ATI Nvidia
GPU name RV635 GF108
Market Desktop Desktop
Clock speed 796 MHz 810 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 120 96
Texture mapping units 8 16
Render output processors 4 4
Pixel rate 3.18 GPixel/s 3.24 GPixel/s
Texture rate 6.37 GTexel/s 12.96 GTexel/s
Floating-point performance 191.04 GFLOPS 311.04 GFLOPS


Radeon HD 4580  vs
GeForce GT 440 
Memory clock speed 693 MHz 900 MHz
Effective memory clock speed 1,386 MHz 1,800 MHz
Memory bus 128 bit 128 bit
Memory 512 MB 1,024 MB
Memory type GDDR3 DDR3
Memory bandwidth 22.18 GB/s 28.8 GB/s

noise and power

TDP 65W 65W


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