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Differences What are the advantages of each

Front view of Radeon HD 4770

Reasons to consider the
ATi Radeon HD 4770

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Significantly higher effective memory clock speed 3,200 MHz vs 800 MHz 4x higher effective memory clock speed
Higher clock speed 750 MHz vs 600 MHz 25% higher clock speed
Higher memory bandwidth 51.2 GB/s vs 6.4 GB/s 8x higher memory bandwidth
Better floating-point performance 960 GFLOPS vs 96 GFLOPS 10x better floating-point performance
More shading units 640 vs 80 560 more shading units
Higher pixel rate 12 GPixel/s vs 2.4 GPixel/s 5x higher pixel rate
Significantly higher memory clock speed 800 MHz vs 400 MHz 2x higher memory clock speed
More render output processors 16 vs 4 12 more render output processors
Higher texture rate 24 GTexel/s vs 4.8 GTexel/s 5x higher texture rate
More texture mapping units 32 vs 8 24 more texture mapping units
More compute units 8 vs 1 7 more compute units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of Radeon HD 4520

Reasons to consider the
ATi Radeon HD 4520

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Lower TDP 25W vs 80W 3.2x lower TDP

Features Key features of the Radeon HD 4770  vs 4520 

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

Radeon HD 4770
51.2 GB/s
Radeon HD 4520
6.4 GB/s

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

Radeon HD 4770
12 GPixel/s
Radeon HD 4520
2.4 GPixel/s

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

Radeon HD 4770
24 GTexel/s
Radeon HD 4520
4.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4770
960 GFLOPS
Radeon HD 4520
96 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 4770  vs
4520 
GPU brand ATI ATI
GPU name RV740 RV710
Market Desktop Desktop
Clock speed 750 MHz 600 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 80
Texture mapping units 32 8
Render output processors 16 4
Compute units 8 1
Pixel rate 12 GPixel/s 2.4 GPixel/s
Texture rate 24 GTexel/s 4.8 GTexel/s
Floating-point performance 960 GFLOPS 96 GFLOPS

memory

Radeon HD 4770  vs
4520 
Memory clock speed 800 MHz 400 MHz
Effective memory clock speed 3,200 MHz 800 MHz
Memory bus 128 bit 64 bit
Memory 512 MB 512 MB
Memory type GDDR5 DDR2
Memory bandwidth 51.2 GB/s 6.4 GB/s

noise and power

TDP 80W 25W

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