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Differences What are the advantages of each

Front view of Mobility Radeon HD 4850 X2

Reasons to consider the
ATi Mobility Radeon HD 4850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Significantly more shading units 1,600 vs 240 1360 more shading units
Higher memory bandwidth 179.2 GB/s vs 141.7 GB/s More than 25% higher memory bandwidth
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Better floating-point performance 1,600 GFLOPS vs 622.1 GFLOPS More than 2.5x better floating-point performance
Slightly higher effective memory clock speed 2,800 MHz vs 2,214 MHz More than 25% higher effective memory clock speed
Front view of GeForce GTX 280

Reasons to consider the
Nvidia GeForce GTX 280

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Higher clock speed 602 MHz vs 500 MHz More than 20% higher clock speed
Higher memory clock speed 1,107 MHz vs 700 MHz Around 60% higher memory clock speed

Features Key features of the Mobility Radeon HD 4850 X2  vs GeForce GTX 280 

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

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

GeForce GTX 280
19.26 GPixel/s

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

GeForce GTX 280
48.16 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 280
622.1 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


Mobility Radeon HD 4850 X2  vs
GeForce GTX 280 
GPU brand ATI Nvidia
GPU name M98 GT200
Market Laptop Desktop
Clock speed 500 MHz 602 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 1,600 240
Texture mapping units 80 80
Render output processors 32 32
Pixel rate 16 GPixel/s 19.26 GPixel/s
Texture rate 40 GTexel/s 48.16 GTexel/s
Floating-point performance 1,600 GFLOPS 622.1 GFLOPS


Mobility Radeon HD 4850 X2  vs
GeForce GTX 280 
Memory clock speed 700 MHz 1,107 MHz
Effective memory clock speed 2,800 MHz 2,214 MHz
Memory bus 512 bit 512 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 GDDR3
Memory bandwidth 179.2 GB/s 141.7 GB/s


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