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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 higher memory bandwidth 179.2 GB/s vs 22.4 GB/s 8x higher memory bandwidth
Higher effective memory clock speed 2,800 MHz vs 1,400 MHz 2x higher effective memory clock speed
Significantly more shading units 1,600 vs 144 1456 more shading units
Better floating-point performance 1,600 GFLOPS vs 451 GFLOPS More than 3.5x better floating-point performance
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
More texture mapping units 80 vs 24 56 more texture mapping units
Higher pixel rate 16 GPixel/s vs 4.7 GPixel/s Around 3.5x higher pixel rate
More render output processors 32 vs 16 Twice as many render output processors
Wider memory bus 512 bit vs 128 bit 4x wider memory bus
Front view of GeForce GTS 450

Reasons to consider the
Nvidia GeForce GTS 450

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Higher clock speed 783 MHz vs 500 MHz More than 55% higher clock speed

Features Key features of the Mobility Radeon HD 4850 X2  vs GeForce GTS 450 

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 GTS 450
4.7 GPixel/s

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

GeForce GTS 450
18.79 GTexel/s

floating point performance How fast the gpu can crunch numbers

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

Mobility Radeon HD 4850 X2  vs
GeForce GTS 450 
GPU brand ATI Nvidia
GPU name M98 GF116
Market Laptop Desktop
Clock speed 500 MHz 783 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 1,600 144
Texture mapping units 80 24
Render output processors 32 16
Pixel rate 16 GPixel/s 4.7 GPixel/s
Texture rate 40 GTexel/s 18.79 GTexel/s
Floating-point performance 1,600 GFLOPS 451 GFLOPS

memory

Mobility Radeon HD 4850 X2  vs
GeForce GTS 450 
Memory clock speed 700 MHz 700 MHz
Effective memory clock speed 2,800 MHz 1,400 MHz
Memory bus 512 bit 128 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 DDR3
Memory bandwidth 179.2 GB/s 22.4 GB/s

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