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Differences What are the advantages of each

Front view of Mobility Radeon HD 3850 X2

Reasons to consider the
ATi Mobility Radeon HD 3850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
More render output processors 32 vs 16 Twice as many render output processors
More shading units 640 vs 128 512 more shading units
Wider memory bus 512 bit vs 256 bit 2x wider memory bus
Lower TDP 70W vs 150W 2.1x lower TDP
Front view of GeForce GTS 250

Reasons to consider the
ZOTAC GeForce GTS 250

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Higher clock speed 750 MHz vs 580 MHz Around 30% higher clock speed
Higher effective memory clock speed 2,300 MHz vs 1,500 MHz Around 55% higher effective memory clock speed
Higher texture rate 48 GTexel/s vs 18.56 GTexel/s More than 2.5x higher texture rate
Higher memory clock speed 1,150 MHz vs 750 MHz Around 55% higher memory clock speed
More texture mapping units 64 vs 32 Twice as many texture mapping units

Features Key features of the Mobility Radeon HD 3850 X2  vs GeForce GTS 250 

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 250
12 GPixel/s

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

GeForce GTS 250
48 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTS 250
483.8 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

Mobility Radeon HD 3850 X2  vs
GeForce GTS 250 
GPU brand ATI Nvidia
GPU name M88 G92 B1
Market Laptop Desktop
Clock speed 580 MHz 750 MHz
Is dual GPU Yes No
Reference card None Nvidia GeForce GTS 250 702 MHz 1 GB

raw performance

Shading units 640 128
Texture mapping units 32 64
Render output processors 32 16
Pixel rate 18.56 GPixel/s 12 GPixel/s
Texture rate 18.56 GTexel/s 48 GTexel/s
Floating-point performance 742.4 GFLOPS 483.8 GFLOPS

memory

Mobility Radeon HD 3850 X2  vs
GeForce GTS 250 
Memory clock speed 750 MHz 1,150 MHz
Effective memory clock speed 1,500 MHz 2,300 MHz
Memory bus 512 bit 256 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR3 GDDR3
Memory bandwidth 96 GB/s 73.6 GB/s

noise and power

TDP 70W 150W

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