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Differences What are the advantages of each

Front view of Radeon HD 4850

Reasons to consider the
ATi Radeon HD 4850

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Better floating-point performance 1,000 GFLOPS vs 144 GFLOPS Around 7x better floating-point performance
Higher memory bandwidth 63.55 GB/s vs 38.02 GB/s More than 65% higher memory bandwidth
More shading units 800 vs 48 752 more shading units
Higher effective memory clock speed 1,986 MHz vs 1,584 MHz More than 25% higher effective memory clock speed
Higher memory clock speed 993 MHz vs 792 MHz More than 25% higher memory clock speed
More texture mapping units 40 vs 24 16 more texture mapping units
Wider memory bus 256 bit vs 192 bit Around 35% wider memory bus
Front view of GeForce GT 130 Mac

Reasons to consider the
Nvidia GeForce GT 130 Mac

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Lower TDP 75W vs 110W More than 30% lower TDP

Features Key features of the Radeon HD 4850  vs GeForce GT 130 Mac 

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

Radeon HD 4850
63.55 GB/s
GeForce GT 130 Mac
38.02 GB/s

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

Radeon HD 4850
10 GPixel/s
GeForce GT 130 Mac
7.2 GPixel/s

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

Radeon HD 4850
25 GTexel/s
GeForce GT 130 Mac
14.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4850
1,000 GFLOPS
GeForce GT 130 Mac
144 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 4850  vs
GeForce GT 130 Mac 
GPU brand ATI Nvidia
GPU name RV770 G94 B1
Market Desktop Desktop
Clock speed 625 MHz 600 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 800 48
Texture mapping units 40 24
Render output processors 16 12
Pixel rate 10 GPixel/s 7.2 GPixel/s
Texture rate 25 GTexel/s 14.4 GTexel/s
Floating-point performance 1,000 GFLOPS 144 GFLOPS

memory

Radeon HD 4850  vs
GeForce GT 130 Mac 
Memory clock speed 993 MHz 792 MHz
Effective memory clock speed 1,986 MHz 1,584 MHz
Memory bus 256 bit 192 bit
Memory 512 MB 512 MB
Memory type GDDR3 GDDR3
Memory bandwidth 63.55 GB/s 38.02 GB/s

noise and power

TDP 110W 75W

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